Calendar - Lesson 1

first of all thanks for being here in my youtube channel so in this lesson number one on the topic calendar we are going to learn introduction completely about the topic calendar so there are two topics and aptitude section one is calendar and the second is clock so these two topics are most important if you are going for SSC staff Selection Commission exams similarly if you are going for our RB railway recruitment board or IT sector interviews or state government exams definitely you will see one question from calendar and also one question from clock it's very interesting and very easy to if you know the traditional method properly basics are important so if you are strong in basics without knowing don't learn any shortcuts right if you learn only shortcuts a 40 percentage of the question can be solved and calendar easily if you are solving 40 second by using a shortcut you can solve the same question in 20 seconds but remember that if you use if you study one lis shortcut there there might be lots of exceptional cases where you can use one a traditional method to solve so remember that now we are going to teach only the traditional method not the shortcut method in future videos I will definitely teach you the shortcut but before learning shortcut try to know what is the traditional method so now in the introduction first we will be seeing what is called as ordinary year and what is called as leap year if by seeing a year right but you need to decide and you need to say whether it is an ordinary year or a leap year the easiest way is now we are at 2019 rate so 2019 whether it is an ordinary year or an EP if you want to find this just check the last two digit alone whether it is divisible by 4 or not if lasted two digit is divisible by 4 if it is getting divided by 4 then it is called as a leap year if it is not divisible by 4 then it is called as an ordinary here next year we have 2020 right so listen carefully here the last two two digit is 20 now it is 2019 on the last two digit is 19 whether 19 is divisible by 4 no it is not divisible by 4 so we can say 20 19 is an ordinary year next year is 2020 take the last two digit last two digit is 20 check whether it is divisible by 4 or not 20 divided by 4 yeah it is reversible so 20 20 is called as a leap here we're 2019 is called as an ordinary year so the year which divides by 4 if it gets divided by 4 then it is called as an DPL if it is not getting divided by 4 then it is called as an ordinary year so the difference between ordinary year underly Pyrrhus ordinary year we have only 365 days but in a leap year we have 366 days so this is the difference between an ordinary year under NEPA if you want to know the difference now we are in 2019 that to February month right in Figment we have only 28 days in this year 2019 check the calendar we have only 28 days if it is a leap year in the February month we have 29 days that's what we leap here contains 366 days and the ordinary air contains 365 days so the only changed it will be happen on the February month just check the calendar in this year we have only 28 days in per month but next year we will have 29 days so it is called as a leap year and it is called as an ordinary year and another important thing this 365 days as 52 week plus 1 day which is called as a 35 days 52 weeks so 52 into 7 we know that one week we have seven days so 52 into seven will be 364 and another one day which is taken as 52 weeks plus one day is an ordinary here and similarly for a leap here 52 weeks plus 2d additional two day listen leap here and this is an ordinary year so remember that a day which is more than a week right which is called as an odd day listen carefully 52 week and one day so in calendar what we usually say is 52 week and one odd day got at 140 similarly in a leap year we have 52 weeks plus two days but in a calendar we will say 52 weeks plus two or days so odd days is nothing but day which is extra days from a week take the take like that if odd day meaningless extra days from a week is called as an odd day and let me take some of the examples right whether 2016 2012 then 1947 1945 1923 so 1916 so let me take weather let me find whether it's an ordinary year or a leap year right 2016 is an ordinary year or a leap year so what you need to do you need to check the last two digit that is 16 weather 16 is divisible by 4 or not yeah it is divisible by 4 so it is called and Sandeep it so because of bleep here in 2016 we will have 366 days you need to say this as 52 week plus 2 or day so every leap year will have 2 or days and every ordinary year we have only one haunted so here it is 2016 what you need to say it is a leap year second this 2016 will have 52 weeks plus two odd days Gordon next is 2012 at the 2012 is le Pere or not check the last two two-digit whether it is disabled by 4 yeah it is divisible by 4 so we can say it's a leap year so 2012 is a leap year if it is a leap here then it contains 366 days and this year will have 52 weeks and additional two odd days so it's Annie p.m. 1947 whether it is a leap year or not no it is not a leap here because 47 will not divide by 4 we can't able to divide 47 by 4 we will get it at a similar point something so it is not a leap year it is an ordinary year if it is an ordinary year then 1947 will have 52 weeks plus 1 or day go ahead and in 1947 for every month we have only 28 days and these two years in a month of February it will have 29 days next number is 1945 whether 1945 is a leap year or not no it is not a leap year because the last two digit is 45 we can't able to divide this 45 by 4 so it is not a leap year is an ordinary year so if it is an ordinary year then this year we'll have 1 odd day Gordon next is 1923 whether 1923 is an ordinary error or a leap here no it's an ordinary year because 23 we can't able to divide 23 by 4 so it is an ordinary year next is 16 yes 16 is a leap year or ordinary year it is a leap year because we can divide this by 4 so every year if it gets divided by 4 then it is called as a leap year if it is not getting disabled by 4 then it is called as an ordinary year and second important thing if it is an ordinary year we have 365 days if it is an leap here we have 366 days if it is 365 days the same thing can be also said as 52 week plus 1 odd day in a calendar we will not say one extra day we will say this as 1 odd day so 52 week plus 1 odd day will be an ordinary year 52 week plus 2 or day when we send a sleepier got it so next is let me take any examples oh there is an exceptional case in the leap here right century years for example if it is 2,000 wait if think that there is a near 2,000 right whether it is a leap year or an ordinary year because we usually divide the last two digit by four but remember that if there is any century yes like last two digit ends with zero for example 1916 hundred four hundred three hundred thousand eight hundred thousand hundred so these are the ears you can see the last two digit is 0 which is called as century yes if it is a century year divide this by 400 if it gets divided by 400 then it is a leap year if it is not divided by 400 then it is not a leap year right so let me take some examples here if it is thousand eight hundred right so a thousand eight hundred whether it is leap year or not first see the last two digit last two two digit is a 0 and 0 so it is called as a century here if it is a century here what you guys have to do you should not divide by 4 you should divide by 400 check whether it is divided 400 or not no it can't be divided by four than that because we can cancel zero and zero so 18 is not divisible by 4 so thousand eight grand red is sent ordinary year not a leap year when we take another example thousand six hundred whether thousand six hundred is an ordinary year or a leap year check the last two digit last two digit is 0 and 0 so it's a century here if it is a century here you should not divide this by 4 you should divide by 400 so thousand six hundred divided by four hundred we can cancel zero zero 16 can be divisible by four so finally thousand six hundred is sent leap year not an ordinary year it's a leap year what it whether two thousand is an ordinary year or a leap year 2000 is a century here right first divide this by 4 if you divide this by 4 where 20 can be divisible by 4 so it isn't leap here let me take another example any other number which is thousand to whenever that thousand 200 is an ordinary year or a leap year it is a leap year because thousand two hundred the last tour digit is 0 0 so it's a century here if it is a century here we need to check whether it is divisible by 400 or not yeah it is divisible by 400 so we can say it's an leap year so similarly if we have 300 wait the year 300 whether it is a leap year or an ordinary year so same thing the last two digit is 0 so divide this by 400 whether it is divisible by 400 no it is not only PA 300 is not a leap year 200 is not a leap year 100 is not a leap year but 400 is a leap year 800 is a leap here thousand two hundred is a leap year which means all the multiples of four is called as a leap year if it is not a multiple of four it's called as an ordinary year that's it right so for example for every leap year 8 will be leap year 12 will be leap year so 16 will be leap year 20 will be leap year because these are the numbers are multiples of 4 in case if the last two digit is 0 and 0 then what you guys have to do you need to divide the number by 400 and check whether it is divisible or not if it is divisible then it is called as a leap here and if it is not divisible then disco as an ordinary hero so let me move on to some of the examples how to find so that you will be better strong on the concepts right so let me move on to some of the examples now so now let me see some of the example here and we can check whether it is a leap year or an ordinary year just to understand the concept really right so first is 1943 so 1943 whether it is a leap year or an ordinary year so 1943 the last two digit is 43 so 43 will not be divided by 4 so we can say it is an ordinary year so because of ordinary year 1943 we will have only 365 days and in 1943 Figment we have only 28 days and 1943 can also be said as 52 weeks and 1 odd day got it 1820 so 1820 is an ordinary here or a leap year the last two digit is 20 so 20 will be disabled by 4 so we can say it is an leap year so 18 20 will be leap year so this year will have 366 days 52 week plus 2 or day so 1732 so the last two digit is 32 whether it is divisible by 4 or not 8 or 32 yeah it is getting divided by 4 so we can say it is a leap year mixed is 1800 so listen carefully the last two digit is 0 and 0 so first we should call it as a century year because last two digit ends with 0 so 1800 is a century year if it is century here you should not divide by 4 you should divide by 400 whether it is getting divided by 400 no it's not so we can say 1800 is an ordinary year 1930 the last two digit will be 30 whether 30 is divisible by 4 no it's not so we can say it is an ordinary year next 2001 2001 in the last two digit is 0 and 1 know it listen here only if the last two digit is 0 and 0 then it is called as a century here right so last two digit here it's ends with 0 under 1 so definitely it is not a leap year it is an ordinary year because when you check whether it is divisible by 4 nope it does not so we can say 2001 as an ordinary year 2020 so last two digit is to 0 so it is getting divided by 4 so we can say it is a leap 2009 so the last two digit is 0 and mine whether it is getting divided by 4 no it is not so it is called as an ordinary year 1916 so last two digit is 16 definitely it will divide by 4 so we can say it is a leap year 19 not 3 so last two digit is 0 and 3 check whether it is divisible by 4 or not no it is not those double by 4 so it is an ordinary year next is 300 so last a two digit is 0 and 0 so it is called as a century year if it is a century here check whether it is divisible by 400 or not so divide by 400 no it is not divisible so we can say it's an ordinary year thousand four hundred lasted to digit is 0 and 0 so it is a century here if it is essentially a check whether it is divisible by 400 no it is not getting those double by 400 so we can say it is an ordinary year it is not a leap here 1616 last a two-digit is 16 so definitely it will be divisible by 4 so we can say 1616 will be leap year 1650 for the last two digit will be 50 for whether it is divisible by 4 or not no it is not divisible so check whether it is dual going for no it is not reversible so we can say it's an ordinary year 1864 1864 last two two-digit is 64 so check whether it is divisible by 400 or not yeah it is getting divided by 4 so we can say it is a leap year that's it so this is the way initially you need to learn how to check the year whether it is a leap year or an ordinary year and second important thing you have to learn s in an ordinary year we have 365 days and the same 365 days can be also written as 52 week plus 1 odd day if it is a leap here we have 366 days and same 366 days can be also written as 52 week plus 2 or day and remember that the difference between a leap year and an ordinary year so ordinary year in folk month we have 28 days but in a leap year the same fragment will have 29 days caught it so that's it about finding the year whether it is a leap year or an ordinary years so now let me move on one of the important concept that is in a can topic is odd D so just now I have told you what is called as an odd day an extra day from a complete week is called as an odd day so let me say some example you can able to understand what is called as an odd day so listen here let me take ten days straight in ten days if the question is asking how many odd days be F so this ten days we need to split in terms of weeks so this 10 day can be written as one week plus three day got it because one week we know that we have seven days so 7 plus 3 will be 10 days so this 10 days can be written as one week and 3 or D so this is the thing we are saying it's an odd days so 10 days contains one week under three odd day so an extra day from a complete week and extra day from a week is called as an odd day let me take another example right let me take 8 days if it is 8 days how many weeks and how many or days are there so eight days can be written as one week plus one or day so got it because one week will be seven day and another one day so total will be eight day so this 8 day can be written as one week and one day so in in eight days totally we have one autumn if it has 16 how many odd days you have in 16 days so this 16 days can be written as 2 week because 2 week will be 14 days plus additional 2 or day so 2 week will be 14 days an additional 2 day when you add both the numbers Susan will be 16 so 16 days as two Audis got it so let me take another example let me take 21 21 days how many odd days be for 21 days listen here 21 can be written as 3 week right because 3 week will be 21 plus 0 or de RINs got it in 3 weeks we will getting 21 days so 3 week plus 0 or dimension has 21 days so for 21 days we don't have any odd day so similarly if it is half of T let me take 50 or days so 50 days let me take 50 days in 50 days how many are days we have just divide that number by because we are going to write this 50 days in terms of week plus additional or day so 50 when you divide 50 by 7 so we can say it has 7 weeks plus a 1 or take so 7 week plus 1 or day because someone into sum will be 49 so 49 plus additional 1 will be 50 so in 50 days we have only one party and remember this chart right if it is one or day then we can say it's um Monday if it is 2 or day then it is a Tuesday if this is 0 or day then it is a Sunday you need to buy a dis it's very easy right starts from 0 ends with 6 and 0 will be Sunday undermining 1 - Tuesday Wednesday Thursday that's it just by our this shot alone so if you get three days three or days then what will be the answer it's a venice day if we are getting 2 or day then what will be the answer to stay if we are getting 0 or take then the answer will be Sunday and if you are getting only one or day then the answer will be Monday so remember that you should learn how to split the days in two weeks and also an order right so let me take another example it 56 so how many or days we are 456 first divide this by sunny so when you divide this by Sun we are going to convert this 56 in terms of week and also days so seven sevens are 49 seven eights are 56 so we can say it as eight weeks if it as eight weeks then we don't have any odd day so 56 can be written as eight week plus zero or day that's it so let me more to some of the examples so that you can know what is called as an ordinary fect Li so now let me move on to some of the examples to find how to know the odd days for the given days so listen here 23 days the first is 23 days in 23 days we have to write this in terms of week and an additional day so 23 can be written as 3 week because 3 week will be 21 day plus additional 2 day so this can be written as 3 week plus 2 or day so 23 days contains 2 odd day if it is a 2.2 or days and the answer will be Tuesday that's it so 12 is so 12 day can be written as a 1 B that is seven plus additional Fridays so this can be taken as 12 days contains five or day if it is five or day then the answer will be Friday next is 42 days 42 days will be six weeks right so six week will be 42 so we don't have any additional day other than this week so we can say six week plus zero or day so 42 days as a zero hot day so this can be written as zero or D so the answer will be Sunday next is 30 days so 30 days we have for someone for 28 so for weeks so for week will be 28 plus additional 2 or day so 30 days we have to our day so if it is 2 or didn't answer will be Tuesday next is 71 days in 71 days how many weeks we have just divided by 7 so we can say 10 week so 10 week will be 70 days because one week 7 days 10 week will be 70 and we will have one additional or take so we can say for 71 days we have additional one on day so this is the way we will find the odd days for the total given days so what you guys have to do is if it is 50 or if it is 110 days or 120 days whatever be first divided by 7 you try to convert the value in terms of week and additional days so the extra days from a week is called us and haunting so try to Baia this chart is very simple so based upon the odd day we will say the answer that's it about odd days so now we can find how many odd days we have for 10 years 20 years in the previous cases in the previous concept if it is 49 days we found how many days are there if it is 23 days all the numbers we are given in days so by using that we convert the days into week and we found how many odd days are there but here for for example for first hundredth century for for example for first hundred years how many or day we have for first 20 years how many odd days we have and now we are going to find that very important and very interesting keenly watched a complete video you too can able to find how many or days are they is God so don't feel difficult it will be very very easy so let me do one thing for first titanius let me take this rain so for first two ten years or 20 years let me take four first 20 years how many odd days be tough listen carefully for first 20 years you guys have to know how many leap years are there and how many ordinary years are there so what is called as a leap year every multiples of four is called as a leap year so from the first year till 20 years how many leap here we have just calculated in a mind for SLE pr8 is an another leap year 12 will be an another leap year 1620 so out of first 20 years we have file appears so five leap year and the remaining 15 will be an ordinary year friends any doubt in listen carefully out of this 20 years we are going to find out of 20 years how many days are there right and first thing what we did in this 20 years we have decided how many leap years are there and how many ordinary years we know that leap year will be multiples of 4 so 4 8 12 16 20 so totally in 20 years we have finally peer so remaining 15 will be an ordinary year next step in the basics I have told you every leap here will have two ordinary days so 5 into 2 this and every ordinary year we have 1 odd day so 15 into 1 friends got it so leap year we will have 366 days which is taken as 52 week plus 2 or day that's what I am saying 4-5 leap here we have 5 into 2 or day similarly for an ordinary year 15 into 15 years into 1 or take so let me multiply this 5 into 2 will be 10 15 into 1 will be 15 so totally we have 25 or days and now we converted the years in 2 days now it is easy to find out there what we guys have to do divide by 7 so 7 3 is our 21 so 3 week plus 4 or day so finally we can say that for first 20 years we have four or take which means what is called as four or day zero will be Sunday one will be Monday two will be Tuesday then three will be monastic what about four four will be Thursday so we can say 31st December of zero zero twentieth year will be thirsty this will be the answer French garden so listen here finally we got 25 odd days for the first 20 years and we got 25 can be written as three weeks because 21 days plus another 4 or take and then they initially I've told you our chart that he put this four or day then it should be taken as Thursday so finally we can say 31st December of the last year 20 will be the Thursday so go ahead let me move on to some of the examples now let me move on to another example four zero zero zero one two zero zero for T so for first forty days that is 40 years rate zero to 40 years let me find how many odd days are there and we can decide which data's listen carefully for first 40 days what is your first target we need to check how many leap years are there how many non leap years are there you don't want to calculate like this one for a to a like that if it is a smaller number we can do that but if you practice more you can directly divide by four we know that one 240 totally we have 40 years 40 years divided by four totally we have 10 Li peers so 10 leap here then 30 ordinary year friends any doubt about it so I am saying 10 leap is because 40 we can divide 40 by 4 if you divide 40 by 4 we can say 10 Li appears if you if you are a beginner do like this right 4 8 12 16 20 24 multiples of 4 8 20 24 28 32 36 and 40 so totally in first 40 years we have 10 leap year and 30 ordinary year kindly don't calculate like this try to calculate by seeing the last digit that is 40 divided by 4 so we will have 10 leap here under remaining 30 ordinary years if it is a leap year how many odd days we have - if it is an ordinary year how many or days one so 10 into 2 will be 20 30 into 1 will be 30 so 30 plus 2 will be 50 days so totally for the first 40 years we have 50 or days so split this 50 or days in terms of weeks so we can say 7 week will be 49 days plus 1 or take so finally one or day 0 will be Sunday 1 will be Monday so we can say 31st December of 0 0 40 will be Monday because we got one day one or day rate one or day which determines Monday and the fortieth the last year 40 31st December of 40th year will be Monday that's those this is the way you need to convert the year in terms of odd day and finally you need to convert the odd day in terms of week and all day and you can able to find the answer so let me want to first undred century how to find the answer 0 200 rate so for the first century yes we can find how many odd days are they interesting so first what you guys have to do we need to divide this by 4 got it listen carefully here we have hundred hundred is a century year if it is a century here you need to divide by 400 so 0 to 99 that we find how many Li PS we have plus hundred is a century year we should divide this by 400 so 0 to 99 how many leap years we have 0 to 40 we have 10 Li PS 40 to 80 we have another 10 leap years that is 20 leap years 88 then 84 88 92 96 so totally we have 24 Li peers in this 0 to 99 and under it is a century here we need to check whether it is leap year or not divided by 400 no it is not getting divided by 400 so hundred is an ordinary year so totally out of the 0 200 we have 24 leap year and remaining 76 ordinary year parents understood this concept most important so first what I did is in this first 100 years we have to check how many leap years we have how many ordinary as we have in order to check how many leap years we have we know that leap years be multiples of 4 so out of 0 to 99 we checked how many Li PSV f so totally 0 to 99 we have 24 new PS and the last hundred here is a century here in the beginning I have told you if it is a century here you should not divide by 4 you should divide by 400 so Undead is not getting divided by 400 so we can say hundred is an ordinary year so totally in the first hundred years we have 24 leap year under seventy six ordinary years next we know that leap year has to or day so 24 into two and an ordinary year we have one day one or day so 76 into 1 so this will be 48 and this will be 76 let me add this so this will be 4 and reminding will be 1 someone and 4 will be 11 11 plus 1 will be 12 that is 124 Ortega so totally we have 124 or day what is your next step you need to split this value in terms of week so let me divide this by someone if you divide this by seven one seven seven so remaining will be 550 for someone's arms are 49 so remaining will be fine so 17 week plus Phi or day so that's it so 17 week plus Phi or day will be total of 124 days so we can say 5 or day what will be the answer 0 will be Sunday 1 will be Monday 2 will be Tuesday 3 will be minus T 4 will be Thursday then 5 will be Friday so answer for this will be Friday so which means the 31st December of the century here that this hundred year will be Friday so that's it so this is the way you need to find the oddest friends got it so finally we can say the century here that is hundred year the last date will be Friday that is 31st December undertale afraid so only thing is you will find all these steps but you should know how to write this alone it is important I do so 0-200 I have spread this as 0 to 99 then hundredth year why because we know that all these multiples of 4 will be a leap year but the last this hundred here alone we need to check whether it is divisible by 400 because in here and it is not divisible by 4 so we have taken this as an ordinary here so out of this 100 years we have 24 leap year and 76 remaining will be 76 so somewhat is its ordinary is and every ordinary here we have 1 odd day and every leap E and we have 2 or day so totally for the first hundred years we have total of 124 or this so split the 124 or Day in terms of week so 17 we classify or day so Phi or day according to the chart we know that it's a Friday so finally 31st to December of the century here first essentially 100 here will be Friday so finally we found for the first hundred years we have Phi or days so for next 200 years well first 200 is that we did for was 200 years it is easy because first hundred years we know Phi or day for first 200 years so five or day into to resultant will be 1000 days so if it is 10 or day we can write this as one week plus three days so again three days zero will be Sunday one will be Monday two will be Tuesday three will be minus T so we can say it will be 1 St that's it it's very easy because once you know this first hundred years how many odd days we have finding all the remaining values would be easy just see for first 300 years how many are days we have we know that first year that is fir standard here we got five or day for first three hundred years we can say 5 into 3 that is 15 or day directly multiply this rate 5 into 3 will be 15 or days so 15 can be written as 2 week plus 1 or day so 0 will be Sunday and 1 will be Monday so we can say answer will be Monday but remember that most important for first afford radius how many odd days we have similarly we can multiply 5 into 4 but we are adding 1 year why we are adding 1 year because hundred as a century year it is not getting doable by 400 similarly 200 is a century when you would divide this by 400 no it is not divisible so we have taken hundred as an ordinary year 200 as an ordinary year 300 as an ordinary year but 400 the year for under the last year 400 whether it is getting decibel by 400 or not yeah it is getting divisible so 400 should be taken as a leap year so only we are adding one again so 5 into 4 will be 20 so 20 plus 1 will be 21 or days so 21 can be written as 3 week plus 0 or day so finally we can say that the last day that this 31st December 400 will be Sunday because we are getting 0 or day for 400 years so we can say the first of four hundred years the last 31st December 400 will be on Sunday so that's it it is more than enough to know all these value or otherwise at least by add this alone first 200 years Phi or day 200 year 3 or days 300 year one or day and 400 year will be zero or they try to buy artists that is enough in case if they ask for first 600 years how many odd days you have it is very easy because 600 can be written as 400 plus 200 keep this 400 as a base value right so 400 plus 200 will be 600 so 400 we have 0 are this for 200 we have 3 or days so totally 3 or days we will have for 600 years if it is some 100 what you guys have to do for some 100 years so split this 700 as 400 plus 300 so 400 we know that we have 0 our day for 300 we have 1 odd day so totally we can say for some 100 we have 1 or take that's it it's easy once you buy out all these 4 values or days value then completely the solving an odd day for an ear will be easy if it is thousand 200 how many odd days we have 4,200 years how many odd days we have thousand 200 some multiples of 400 so 400 into 3 will be thousand 200 so we can say for in 400 we have 0 ax t so similarly in thousand 200 again we will have 0 or days so every century is that is multiple of 4 will zero or that's it four hundred thousand two hundred thousand six hundred two thousand so these are the numbers you will have a zero R T so by keeping this four hundred as a base we can easily find the answer so in next video we will be solving some of the questions on the topic calendar so at that time you can able to understand so why we are writing all these steps so finally let me have a small revision that we seen in the introduction concept because it's important right why we are dividing by four why we are dividing a number by 400 so everything is important so first why we divide an ear by four in order to find whether it is a leap year or an ordinary year right if the last two digit is divisible by four then it is called as a leap year so leap year will add 366 days if last a two-digit is not divisible by four then it is called as an ordinary here so ordinary area will have 365 days and second why we are dividing some numbers by 400 because if it is a century here the last two digit of a year is zero and zero thousand eight hundred thousand six hundred two thousand hundred thousand five hundred thousand four hundred so these are the years the last two digit ends with zero zero so it is called as a century here if it is a century here you should not divide by four you should divide the number by 400 if it gets divisible by 400 then it is a leap year if it is not getting divided by 400 and it's an ordinary year and the last way we are dividing by 7 in order to split the given days in terms of week and/or day he put this 21 days so 21 days can be written as 3 week plus 0 or D if it is 22 days so 22 days can be written as 3 week plus 1 or day so that's what we are dividing by 7 and the last is an odd day chart so starts with 0 and ends with 6 so 0 will be Sunday that's it by musing on this chart or day chart we can able to find the answer so 0 will be Sunday and 1 will be Monday and goes on till the Saturday ok so that's it about introduction on the topic calendar so don't forget to watch the remaining video only if you practice more you can able to crack the question on calendars without practicing just by looking at the video you can't so try to solve more and more number of questions try to pick the numbers might just take 1943 and check whether it is a leap year or not and for this year how many odd days we have similarly for the jan month our days we have so try to calculate all those values once you practice more definitely calendar topic will be very very easy so thank you so much for watching this video so if you really liked it share it to your friends so that their friends can also learn this so thank you so much

first of all thanks for being here in my youtube channel so in this lesson number one on the topic calendar we are going to learn introduction completely about the topic calendar so there are two topics and aptitude section one is calendar and the second is clock so these two topics are most important if you are going for SSC staff Selection Commission exams similarly if you are going for our RB railway recruitment board or IT sector interviews or state government exams definitely you will see one question from calendar and also one question from clock it&#39;s very interesting and very easy to if you know the traditional method properly basics are important so if you are strong in basics without knowing don&#39;t learn any shortcuts right if you learn only shortcuts a 40 percentage of the question can be solved and calendar easily if you are solving 40 second by using a shortcut you can solve the same question in 20 seconds but remember that if you use if you study one lis shortcut there there might be lots of exceptional cases where you can use one a traditional method to solve so remember that now we are going to teach only the traditional method not the shortcut method in future videos I will definitely teach you the shortcut but before learning shortcut try to know what is the traditional method so now in the introduction first we will be seeing what is called as ordinary year and what is called as leap year if by seeing a year right but you need to decide and you need to say whether it is an ordinary year or a leap year the easiest way is now we are at 2019 rate so 2019 whether it is an ordinary year or an EP if you want to find this just check the last two digit alone whether it is divisible by 4 or not if lasted two digit is divisible by 4 if it is getting divided by 4 then it is called as a leap year if it is not divisible by 4 then it is called as an ordinary here next year we have 2020 right so listen carefully here the last two two digit is 20 now it is 2019 on the last two digit is 19 whether 19 is divisible by 4 no it is not divisible by 4 so we can say 20 19 is an ordinary year next year is 2020 take the last two digit last two digit is 20 check whether it is divisible by 4 or not 20 divided by 4 yeah it is reversible so 20 20 is called as a leap here we&#39;re 2019 is called as an ordinary year so the year which divides by 4 if it gets divided by 4 then it is called as an DPL if it is not getting divided by 4 then it is called as an ordinary year so the difference between ordinary year underly Pyrrhus ordinary year we have only 365 days but in a leap year we have 366 days so this is the difference between an ordinary year under NEPA if you want to know the difference now we are in 2019 that to February month right in Figment we have only 28 days in this year 2019 check the calendar we have only 28 days if it is a leap year in the February month we have 29 days that&#39;s what we leap here contains 366 days and the ordinary air contains 365 days so the only changed it will be happen on the February month just check the calendar in this year we have only 28 days in per month but next year we will have 29 days so it is called as a leap year and it is called as an ordinary year and another important thing this 365 days as 52 week plus 1 day which is called as a 35 days 52 weeks so 52 into 7 we know that one week we have seven days so 52 into seven will be 364 and another one day which is taken as 52 weeks plus one day is an ordinary here and similarly for a leap here 52 weeks plus 2d additional two day listen leap here and this is an ordinary year so remember that a day which is more than a week right which is called as an odd day listen carefully 52 week and one day so in calendar what we usually say is 52 week and one odd day got at 140 similarly in a leap year we have 52 weeks plus two days but in a calendar we will say 52 weeks plus two or days so odd days is nothing but day which is extra days from a week take the take like that if odd day meaningless extra days from a week is called as an odd day and let me take some of the examples right whether 2016 2012 then 1947 1945 1923 so 1916 so let me take weather let me find whether it&#39;s an ordinary year or a leap year right 2016 is an ordinary year or a leap year so what you need to do you need to check the last two digit that is 16 weather 16 is divisible by 4 or not yeah it is divisible by 4 so it is called and Sandeep it so because of bleep here in 2016 we will have 366 days you need to say this as 52 week plus 2 or day so every leap year will have 2 or days and every ordinary year we have only one haunted so here it is 2016 what you need to say it is a leap year second this 2016 will have 52 weeks plus two odd days Gordon next is 2012 at the 2012 is le Pere or not check the last two two-digit whether it is disabled by 4 yeah it is divisible by 4 so we can say it&#39;s a leap year so 2012 is a leap year if it is a leap here then it contains 366 days and this year will have 52 weeks and additional two odd days so it&#39;s Annie p.m. 1947 whether it is a leap year or not no it is not a leap here because 47 will not divide by 4 we can&#39;t able to divide 47 by 4 we will get it at a similar point something so it is not a leap year it is an ordinary year if it is an ordinary year then 1947 will have 52 weeks plus 1 or day go ahead and in 1947 for every month we have only 28 days and these two years in a month of February it will have 29 days next number is 1945 whether 1945 is a leap year or not no it is not a leap year because the last two digit is 45 we can&#39;t able to divide this 45 by 4 so it is not a leap year is an ordinary year so if it is an ordinary year then this year we&#39;ll have 1 odd day Gordon next is 1923 whether 1923 is an ordinary error or a leap here no it&#39;s an ordinary year because 23 we can&#39;t able to divide 23 by 4 so it is an ordinary year next is 16 yes 16 is a leap year or ordinary year it is a leap year because we can divide this by 4 so every year if it gets divided by 4 then it is called as a leap year if it is not getting disabled by 4 then it is called as an ordinary year and second important thing if it is an ordinary year we have 365 days if it is an leap here we have 366 days if it is 365 days the same thing can be also said as 52 week plus 1 odd day in a calendar we will not say one extra day we will say this as 1 odd day so 52 week plus 1 odd day will be an ordinary year 52 week plus 2 or day when we send a sleepier got it so next is let me take any examples oh there is an exceptional case in the leap here right century years for example if it is 2,000 wait if think that there is a near 2,000 right whether it is a leap year or an ordinary year because we usually divide the last two digit by four but remember that if there is any century yes like last two digit ends with zero for example 1916 hundred four hundred three hundred thousand eight hundred thousand hundred so these are the ears you can see the last two digit is 0 which is called as century yes if it is a century year divide this by 400 if it gets divided by 400 then it is a leap year if it is not divided by 400 then it is not a leap year right so let me take some examples here if it is thousand eight hundred right so a thousand eight hundred whether it is leap year or not first see the last two digit last two two digit is a 0 and 0 so it is called as a century here if it is a century here what you guys have to do you should not divide by 4 you should divide by 400 check whether it is divided 400 or not no it can&#39;t be divided by four than that because we can cancel zero and zero so 18 is not divisible by 4 so thousand eight grand red is sent ordinary year not a leap year when we take another example thousand six hundred whether thousand six hundred is an ordinary year or a leap year check the last two digit last two digit is 0 and 0 so it&#39;s a century here if it is a century here you should not divide this by 4 you should divide by 400 so thousand six hundred divided by four hundred we can cancel zero zero 16 can be divisible by four so finally thousand six hundred is sent leap year not an ordinary year it&#39;s a leap year what it whether two thousand is an ordinary year or a leap year 2000 is a century here right first divide this by 4 if you divide this by 4 where 20 can be divisible by 4 so it isn&#39;t leap here let me take another example any other number which is thousand to whenever that thousand 200 is an ordinary year or a leap year it is a leap year because thousand two hundred the last tour digit is 0 0 so it&#39;s a century here if it is a century here we need to check whether it is divisible by 400 or not yeah it is divisible by 400 so we can say it&#39;s an leap year so similarly if we have 300 wait the year 300 whether it is a leap year or an ordinary year so same thing the last two digit is 0 so divide this by 400 whether it is divisible by 400 no it is not only PA 300 is not a leap year 200 is not a leap year 100 is not a leap year but 400 is a leap year 800 is a leap here thousand two hundred is a leap year which means all the multiples of four is called as a leap year if it is not a multiple of four it&#39;s called as an ordinary year that&#39;s it right so for example for every leap year 8 will be leap year 12 will be leap year so 16 will be leap year 20 will be leap year because these are the numbers are multiples of 4 in case if the last two digit is 0 and 0 then what you guys have to do you need to divide the number by 400 and check whether it is divisible or not if it is divisible then it is called as a leap here and if it is not divisible then disco as an ordinary hero so let me move on to some of the examples how to find so that you will be better strong on the concepts right so let me move on to some of the examples now so now let me see some of the example here and we can check whether it is a leap year or an ordinary year just to understand the concept really right so first is 1943 so 1943 whether it is a leap year or an ordinary year so 1943 the last two digit is 43 so 43 will not be divided by 4 so we can say it is an ordinary year so because of ordinary year 1943 we will have only 365 days and in 1943 Figment we have only 28 days and 1943 can also be said as 52 weeks and 1 odd day got it 1820 so 1820 is an ordinary here or a leap year the last two digit is 20 so 20 will be disabled by 4 so we can say it is an leap year so 18 20 will be leap year so this year will have 366 days 52 week plus 2 or day so 1732 so the last two digit is 32 whether it is divisible by 4 or not 8 or 32 yeah it is getting divided by 4 so we can say it is a leap year mixed is 1800 so listen carefully the last two digit is 0 and 0 so first we should call it as a century year because last two digit ends with 0 so 1800 is a century year if it is century here you should not divide by 4 you should divide by 400 whether it is getting divided by 400 no it&#39;s not so we can say 1800 is an ordinary year 1930 the last two digit will be 30 whether 30 is divisible by 4 no it&#39;s not so we can say it is an ordinary year next 2001 2001 in the last two digit is 0 and 1 know it listen here only if the last two digit is 0 and 0 then it is called as a century here right so last two digit here it&#39;s ends with 0 under 1 so definitely it is not a leap year it is an ordinary year because when you check whether it is divisible by 4 nope it does not so we can say 2001 as an ordinary year 2020 so last two digit is to 0 so it is getting divided by 4 so we can say it is a leap 2009 so the last two digit is 0 and mine whether it is getting divided by 4 no it is not so it is called as an ordinary year 1916 so last two digit is 16 definitely it will divide by 4 so we can say it is a leap year 19 not 3 so last two digit is 0 and 3 check whether it is divisible by 4 or not no it is not those double by 4 so it is an ordinary year next is 300 so last a two digit is 0 and 0 so it is called as a century year if it is a century here check whether it is divisible by 400 or not so divide by 400 no it is not divisible so we can say it&#39;s an ordinary year thousand four hundred lasted to digit is 0 and 0 so it is a century here if it is essentially a check whether it is divisible by 400 no it is not getting those double by 400 so we can say it is an ordinary year it is not a leap here 1616 last a two-digit is 16 so definitely it will be divisible by 4 so we can say 1616 will be leap year 1650 for the last two digit will be 50 for whether it is divisible by 4 or not no it is not divisible so check whether it is dual going for no it is not reversible so we can say it&#39;s an ordinary year 1864 1864 last two two-digit is 64 so check whether it is divisible by 400 or not yeah it is getting divided by 4 so we can say it is a leap year that&#39;s it so this is the way initially you need to learn how to check the year whether it is a leap year or an ordinary year and second important thing you have to learn s in an ordinary year we have 365 days and the same 365 days can be also written as 52 week plus 1 odd day if it is a leap here we have 366 days and same 366 days can be also written as 52 week plus 2 or day and remember that the difference between a leap year and an ordinary year so ordinary year in folk month we have 28 days but in a leap year the same fragment will have 29 days caught it so that&#39;s it about finding the year whether it is a leap year or an ordinary years so now let me move on one of the important concept that is in a can topic is odd D so just now I have told you what is called as an odd day an extra day from a complete week is called as an odd day so let me say some example you can able to understand what is called as an odd day so listen here let me take ten days straight in ten days if the question is asking how many odd days be F so this ten days we need to split in terms of weeks so this 10 day can be written as one week plus three day got it because one week we know that we have seven days so 7 plus 3 will be 10 days so this 10 days can be written as one week and 3 or D so this is the thing we are saying it&#39;s an odd days so 10 days contains one week under three odd day so an extra day from a complete week and extra day from a week is called as an odd day let me take another example right let me take 8 days if it is 8 days how many weeks and how many or days are there so eight days can be written as one week plus one or day so got it because one week will be seven day and another one day so total will be eight day so this 8 day can be written as one week and one day so in in eight days totally we have one autumn if it has 16 how many odd days you have in 16 days so this 16 days can be written as 2 week because 2 week will be 14 days plus additional 2 or day so 2 week will be 14 days an additional 2 day when you add both the numbers Susan will be 16 so 16 days as two Audis got it so let me take another example let me take 21 21 days how many odd days be for 21 days listen here 21 can be written as 3 week right because 3 week will be 21 plus 0 or de RINs got it in 3 weeks we will getting 21 days so 3 week plus 0 or dimension has 21 days so for 21 days we don&#39;t have any odd day so similarly if it is half of T let me take 50 or days so 50 days let me take 50 days in 50 days how many are days we have just divide that number by because we are going to write this 50 days in terms of week plus additional or day so 50 when you divide 50 by 7 so we can say it has 7 weeks plus a 1 or take so 7 week plus 1 or day because someone into sum will be 49 so 49 plus additional 1 will be 50 so in 50 days we have only one party and remember this chart right if it is one or day then we can say it&#39;s um Monday if it is 2 or day then it is a Tuesday if this is 0 or day then it is a Sunday you need to buy a dis it&#39;s very easy right starts from 0 ends with 6 and 0 will be Sunday undermining 1 - Tuesday Wednesday Thursday that&#39;s it just by our this shot alone so if you get three days three or days then what will be the answer it&#39;s a venice day if we are getting 2 or day then what will be the answer to stay if we are getting 0 or take then the answer will be Sunday and if you are getting only one or day then the answer will be Monday so remember that you should learn how to split the days in two weeks and also an order right so let me take another example it 56 so how many or days we are 456 first divide this by sunny so when you divide this by Sun we are going to convert this 56 in terms of week and also days so seven sevens are 49 seven eights are 56 so we can say it as eight weeks if it as eight weeks then we don&#39;t have any odd day so 56 can be written as eight week plus zero or day that&#39;s it so let me more to some of the examples so that you can know what is called as an ordinary fect Li so now let me move on to some of the examples to find how to know the odd days for the given days so listen here 23 days the first is 23 days in 23 days we have to write this in terms of week and an additional day so 23 can be written as 3 week because 3 week will be 21 day plus additional 2 day so this can be written as 3 week plus 2 or day so 23 days contains 2 odd day if it is a 2.2 or days and the answer will be Tuesday that&#39;s it so 12 is so 12 day can be written as a 1 B that is seven plus additional Fridays so this can be taken as 12 days contains five or day if it is five or day then the answer will be Friday next is 42 days 42 days will be six weeks right so six week will be 42 so we don&#39;t have any additional day other than this week so we can say six week plus zero or day so 42 days as a zero hot day so this can be written as zero or D so the answer will be Sunday next is 30 days so 30 days we have for someone for 28 so for weeks so for week will be 28 plus additional 2 or day so 30 days we have to our day so if it is 2 or didn&#39;t answer will be Tuesday next is 71 days in 71 days how many weeks we have just divided by 7 so we can say 10 week so 10 week will be 70 days because one week 7 days 10 week will be 70 and we will have one additional or take so we can say for 71 days we have additional one on day so this is the way we will find the odd days for the total given days so what you guys have to do is if it is 50 or if it is 110 days or 120 days whatever be first divided by 7 you try to convert the value in terms of week and additional days so the extra days from a week is called us and haunting so try to Baia this chart is very simple so based upon the odd day we will say the answer that&#39;s it about odd days so now we can find how many odd days we have for 10 years 20 years in the previous cases in the previous concept if it is 49 days we found how many days are there if it is 23 days all the numbers we are given in days so by using that we convert the days into week and we found how many odd days are there but here for for example for first hundredth century for for example for first hundred years how many or day we have for first 20 years how many odd days we have and now we are going to find that very important and very interesting keenly watched a complete video you too can able to find how many or days are they is God so don&#39;t feel difficult it will be very very easy so let me do one thing for first titanius let me take this rain so for first two ten years or 20 years let me take four first 20 years how many odd days be tough listen carefully for first 20 years you guys have to know how many leap years are there and how many ordinary years are there so what is called as a leap year every multiples of four is called as a leap year so from the first year till 20 years how many leap here we have just calculated in a mind for SLE pr8 is an another leap year 12 will be an another leap year 1620 so out of first 20 years we have file appears so five leap year and the remaining 15 will be an ordinary year friends any doubt in listen carefully out of this 20 years we are going to find out of 20 years how many days are there right and first thing what we did in this 20 years we have decided how many leap years are there and how many ordinary years we know that leap year will be multiples of 4 so 4 8 12 16 20 so totally in 20 years we have finally peer so remaining 15 will be an ordinary year next step in the basics I have told you every leap here will have two ordinary days so 5 into 2 this and every ordinary year we have 1 odd day so 15 into 1 friends got it so leap year we will have 366 days which is taken as 52 week plus 2 or day that&#39;s what I am saying 4-5 leap here we have 5 into 2 or day similarly for an ordinary year 15 into 15 years into 1 or take so let me multiply this 5 into 2 will be 10 15 into 1 will be 15 so totally we have 25 or days and now we converted the years in 2 days now it is easy to find out there what we guys have to do divide by 7 so 7 3 is our 21 so 3 week plus 4 or day so finally we can say that for first 20 years we have four or take which means what is called as four or day zero will be Sunday one will be Monday two will be Tuesday then three will be monastic what about four four will be Thursday so we can say 31st December of zero zero twentieth year will be thirsty this will be the answer French garden so listen here finally we got 25 odd days for the first 20 years and we got 25 can be written as three weeks because 21 days plus another 4 or take and then they initially I&#39;ve told you our chart that he put this four or day then it should be taken as Thursday so finally we can say 31st December of the last year 20 will be the Thursday so go ahead let me move on to some of the examples now let me move on to another example four zero zero zero one two zero zero for T so for first forty days that is 40 years rate zero to 40 years let me find how many odd days are there and we can decide which data&#39;s listen carefully for first 40 days what is your first target we need to check how many leap years are there how many non leap years are there you don&#39;t want to calculate like this one for a to a like that if it is a smaller number we can do that but if you practice more you can directly divide by four we know that one 240 totally we have 40 years 40 years divided by four totally we have 10 Li peers so 10 leap here then 30 ordinary year friends any doubt about it so I am saying 10 leap is because 40 we can divide 40 by 4 if you divide 40 by 4 we can say 10 Li appears if you if you are a beginner do like this right 4 8 12 16 20 24 multiples of 4 8 20 24 28 32 36 and 40 so totally in first 40 years we have 10 leap year and 30 ordinary year kindly don&#39;t calculate like this try to calculate by seeing the last digit that is 40 divided by 4 so we will have 10 leap here under remaining 30 ordinary years if it is a leap year how many odd days we have - if it is an ordinary year how many or days one so 10 into 2 will be 20 30 into 1 will be 30 so 30 plus 2 will be 50 days so totally for the first 40 years we have 50 or days so split this 50 or days in terms of weeks so we can say 7 week will be 49 days plus 1 or take so finally one or day 0 will be Sunday 1 will be Monday so we can say 31st December of 0 0 40 will be Monday because we got one day one or day rate one or day which determines Monday and the fortieth the last year 40 31st December of 40th year will be Monday that&#39;s those this is the way you need to convert the year in terms of odd day and finally you need to convert the odd day in terms of week and all day and you can able to find the answer so let me want to first undred century how to find the answer 0 200 rate so for the first century yes we can find how many odd days are they interesting so first what you guys have to do we need to divide this by 4 got it listen carefully here we have hundred hundred is a century year if it is a century here you need to divide by 400 so 0 to 99 that we find how many Li PS we have plus hundred is a century year we should divide this by 400 so 0 to 99 how many leap years we have 0 to 40 we have 10 Li PS 40 to 80 we have another 10 leap years that is 20 leap years 88 then 84 88 92 96 so totally we have 24 Li peers in this 0 to 99 and under it is a century here we need to check whether it is leap year or not divided by 400 no it is not getting divided by 400 so hundred is an ordinary year so totally out of the 0 200 we have 24 leap year and remaining 76 ordinary year parents understood this concept most important so first what I did is in this first 100 years we have to check how many leap years we have how many ordinary as we have in order to check how many leap years we have we know that leap years be multiples of 4 so out of 0 to 99 we checked how many Li PSV f so totally 0 to 99 we have 24 new PS and the last hundred here is a century here in the beginning I have told you if it is a century here you should not divide by 4 you should divide by 400 so Undead is not getting divided by 400 so we can say hundred is an ordinary year so totally in the first hundred years we have 24 leap year under seventy six ordinary years next we know that leap year has to or day so 24 into two and an ordinary year we have one day one or day so 76 into 1 so this will be 48 and this will be 76 let me add this so this will be 4 and reminding will be 1 someone and 4 will be 11 11 plus 1 will be 12 that is 124 Ortega so totally we have 124 or day what is your next step you need to split this value in terms of week so let me divide this by someone if you divide this by seven one seven seven so remaining will be 550 for someone&#39;s arms are 49 so remaining will be fine so 17 week plus Phi or day so that&#39;s it so 17 week plus Phi or day will be total of 124 days so we can say 5 or day what will be the answer 0 will be Sunday 1 will be Monday 2 will be Tuesday 3 will be minus T 4 will be Thursday then 5 will be Friday so answer for this will be Friday so which means the 31st December of the century here that this hundred year will be Friday so that&#39;s it so this is the way you need to find the oddest friends got it so finally we can say the century here that is hundred year the last date will be Friday that is 31st December undertale afraid so only thing is you will find all these steps but you should know how to write this alone it is important I do so 0-200 I have spread this as 0 to 99 then hundredth year why because we know that all these multiples of 4 will be a leap year but the last this hundred here alone we need to check whether it is divisible by 400 because in here and it is not divisible by 4 so we have taken this as an ordinary here so out of this 100 years we have 24 leap year and 76 remaining will be 76 so somewhat is its ordinary is and every ordinary here we have 1 odd day and every leap E and we have 2 or day so totally for the first hundred years we have total of 124 or this so split the 124 or Day in terms of week so 17 we classify or day so Phi or day according to the chart we know that it&#39;s a Friday so finally 31st to December of the century here first essentially 100 here will be Friday so finally we found for the first hundred years we have Phi or days so for next 200 years well first 200 is that we did for was 200 years it is easy because first hundred years we know Phi or day for first 200 years so five or day into to resultant will be 1000 days so if it is 10 or day we can write this as one week plus three days so again three days zero will be Sunday one will be Monday two will be Tuesday three will be minus T so we can say it will be 1 St that&#39;s it it&#39;s very easy because once you know this first hundred years how many odd days we have finding all the remaining values would be easy just see for first 300 years how many are days we have we know that first year that is fir standard here we got five or day for first three hundred years we can say 5 into 3 that is 15 or day directly multiply this rate 5 into 3 will be 15 or days so 15 can be written as 2 week plus 1 or day so 0 will be Sunday and 1 will be Monday so we can say answer will be Monday but remember that most important for first afford radius how many odd days we have similarly we can multiply 5 into 4 but we are adding 1 year why we are adding 1 year because hundred as a century year it is not getting doable by 400 similarly 200 is a century when you would divide this by 400 no it is not divisible so we have taken hundred as an ordinary year 200 as an ordinary year 300 as an ordinary year but 400 the year for under the last year 400 whether it is getting decibel by 400 or not yeah it is getting divisible so 400 should be taken as a leap year so only we are adding one again so 5 into 4 will be 20 so 20 plus 1 will be 21 or days so 21 can be written as 3 week plus 0 or day so finally we can say that the last day that this 31st December 400 will be Sunday because we are getting 0 or day for 400 years so we can say the first of four hundred years the last 31st December 400 will be on Sunday so that&#39;s it it is more than enough to know all these value or otherwise at least by add this alone first 200 years Phi or day 200 year 3 or days 300 year one or day and 400 year will be zero or they try to buy artists that is enough in case if they ask for first 600 years how many odd days you have it is very easy because 600 can be written as 400 plus 200 keep this 400 as a base value right so 400 plus 200 will be 600 so 400 we have 0 are this for 200 we have 3 or days so totally 3 or days we will have for 600 years if it is some 100 what you guys have to do for some 100 years so split this 700 as 400 plus 300 so 400 we know that we have 0 our day for 300 we have 1 odd day so totally we can say for some 100 we have 1 or take that&#39;s it it&#39;s easy once you buy out all these 4 values or days value then completely the solving an odd day for an ear will be easy if it is thousand 200 how many odd days we have 4,200 years how many odd days we have thousand 200 some multiples of 400 so 400 into 3 will be thousand 200 so we can say for in 400 we have 0 ax t so similarly in thousand 200 again we will have 0 or days so every century is that is multiple of 4 will zero or that&#39;s it four hundred thousand two hundred thousand six hundred two thousand so these are the numbers you will have a zero R T so by keeping this four hundred as a base we can easily find the answer so in next video we will be solving some of the questions on the topic calendar so at that time you can able to understand so why we are writing all these steps so finally let me have a small revision that we seen in the introduction concept because it&#39;s important right why we are dividing by four why we are dividing a number by 400 so everything is important so first why we divide an ear by four in order to find whether it is a leap year or an ordinary year right if the last two digit is divisible by four then it is called as a leap year so leap year will add 366 days if last a two-digit is not divisible by four then it is called as an ordinary here so ordinary area will have 365 days and second why we are dividing some numbers by 400 because if it is a century here the last two digit of a year is zero and zero thousand eight hundred thousand six hundred two thousand hundred thousand five hundred thousand four hundred so these are the years the last two digit ends with zero zero so it is called as a century here if it is a century here you should not divide by four you should divide the number by 400 if it gets divisible by 400 then it is a leap year if it is not getting divided by 400 and it&#39;s an ordinary year and the last way we are dividing by 7 in order to split the given days in terms of week and/or day he put this 21 days so 21 days can be written as 3 week plus 0 or D if it is 22 days so 22 days can be written as 3 week plus 1 or day so that&#39;s what we are dividing by 7 and the last is an odd day chart so starts with 0 and ends with 6 so 0 will be Sunday that&#39;s it by musing on this chart or day chart we can able to find the answer so 0 will be Sunday and 1 will be Monday and goes on till the Saturday ok so that&#39;s it about introduction on the topic calendar so don&#39;t forget to watch the remaining video only if you practice more you can able to crack the question on calendars without practicing just by looking at the video you can&#39;t so try to solve more and more number of questions try to pick the numbers might just take 1943 and check whether it is a leap year or not and for this year how many odd days we have similarly for the jan month our days we have so try to calculate all those values once you practice more definitely calendar topic will be very very easy so thank you so much for watching this video so if you really liked it share it to your friends so that their friends can also learn this so thank you so much

Transcript for:Calendar - Lesson 1

Transcript for:
Calendar - Lesson 1