data interpretation and logical reasoning now this is a section that pains many of us and is very natural because I know that all the section pains but DLR is a different pain because Quant at least we know that section at least we understands what Quant is because we have studied Quant throughout our life in our school and VC section it's about what reading comprehension at some point in our life we have done some comprehension but DLR never there was no class or no lesson on DLR ever taught to us anywhere during our school days the first time we encounter questions like these is in these exams and and it kind of therefore creates a little bit of pain because of the unfamiliarity with respect to many of these kind of questions but one thing that you need to understand it's it's kind of crackable it's actually very fun doing drr I remember doing my um the cat preparation way way way way back the what I really enjoyed but I'm using word enjoyed yes I did not enjoy VC I just didn't though today I'm a VC trainer that's a different story okay but I really enjoyed solving DLR and a lot of you have requested that I should I should do more lessons or more videos on DLR and this is what I thought why not teach you a few things do a series of sessions on drr pick up actually questions and solve this with this in mind right some of you the the the DLR section just works for you you read a clue you understands it oh I can things works in your in your mind automatically but for many of us that doesn't happen we have to really work hard with each of this clue and how do we do this so in this first video I'm going to pick up one type of questions which has to got to do with sequencing these are a part of analytical reasoning and we looking at sequencing and I'm going to call it sequencing games and I'm deliberating use the word games because then it's fun games are fun DLR is fun so let's start with sequencing game and here I'm going to pick up three uh sets from cat and use those set to give you some ideas in terms of how to go about these kind of questions and I will also leave a link to the particular question you can first have a look at the question and try to solve it yourself and then watch the video that I leave it to you right the first thing about the sequencing or in fact anything with DLR is to have a process process is important we need to have a sense of control right many of many times what happens when we Sol DLR we we feel that we are losing control of the set I I can't get a handle of this particular set I'm losing control we should be in control we should we should at least create illusion at least that we are in control so the Mind Is Telling oursel oh oh yes yes yes we are on the right track so for that process is very very good and I'm just going to call this process D process itself with four critical Steps step number one deifer we need to understand the game step number two identify identify what identify what is that we need to find out out step number three a very critical step in many of the sequencing games in fact many of analytical reasoning games is layouting lot of information is given on the screen but I have to capture the information on my working sheet I'm not calling it the rough sheet I'm calling working sheet it's not rough it's a working sheet I want to capture the information here I don't want to go like this I I want to work here I I I'm to kind of work and do the work capture all the information on my on my sheet and then work with the sheet and then solve the questions and very important it resolve resolve all the clues there all the clue and lot of these things may happen side by side but let's start with this okay let's look at this four process and I'm going to start with a set of cat 2018 so when you look at the set right the first thing that you got to do is don't fall for how the set looks its length what is given we will make a decision about the set after reading the set okay when you're reading the set read it like how you going to play a game think about a board game think about Chess for example what does chess have chess have pieces it's got a board and there are some rules right so when when you look at this game and and and the rules about how the game has to be played right so think about these as as just a game so I need to identify what are the pieces what is the board that I'm going to use and what are the rules and and then then how do you go about it okay seven candidates those are my pieces a b c d e f and g okay we have got to have the seven pieces what is that we got to do where invited to interview for a position this information is not really important when it comes to uh DLR set what is important for us to understand there are seven pieces and these are the seven pieces that is important okay they could have been invited for anything who cares okay so let's do seven pieces candidates were required to reach the venue before 8:00 a.m. no problem immediately upon our arrival they were sent to one of the three interview rooms oh this is the place where these pieces are going so we've got three boards 101 102 103 okay we have to put them in these boxes the following venue logs shows arrival time of these candidates some of the names have been not been recorded in the log and have been marked as question mark okay arrival times of this candidate at the venue this is arrival time as the venue but we have got three rooms as soon as they entered the venue they are alloted in these three interview rooms so IM this this tells me that this is a sequencing is happening in the S when I say sequencing you could say linear Arrangement just arranging things uh some a and somebody uh came and we don't know these two we got CNF at least we know that at least these people in came to the venue whom we don't know we know about a we know about C we we know about F at least when they came arrived we don't know about b d e and G that's what we got to find out all right now here at this point in time just just just go through the rules it's okay I was a third person in the room 1011 I was the last person ENT the room I was allotted to e saying I was the only person in the room that I was allotted to F says I was three people along with a all all in the room that was alloted to when I entered it g says I was the one of the two everybody's talking about the room allot allotment okay when did they arrive at the room here again last person so again sequencing within the room sequencing across the venue all right great okay this is a sequencing game this is fine this is fine we'll have to kind of use these rules to figure out who is getting into these rooms and then use that eventually to figure out who is coming to the venue I think that's the story now let's just identify what is the question want us to do let's go through question what can be said about the room to which diva was alloted to which room did he go who else was in room 102 when G entered okay when did E reach the venue if now there's a new condition last one okay if G entered the venue before D when did B enter the venue okay couple of questions about venue couple of questions about rooms so I think I think what is very very clear let's let's crack the story crack the complete game and then we will we will handle it okay so the first thing first okay so I've got this okay so we have done Deering we identified what we have to do now we have to do layouting when you do this layouting please understand some of the things that I'm doing here is may not be necessary in the sense to crack it you might see that this unnecessary step but you need to understand we are struggling with DLR we need to have a sense of control some of the things that I'm doing is just to create an illusion of control the first thing that I would do first thing seven cand let me write those pieces Nothing Stops me writing those pieces let's write those pieces we have got a b c d e f and g there are seven pieces write these seven pieces here if you look the this means that I have captured you this information was on the screen I put the information here okay we anyway need this board there is already a board given okay we don't have to draw this table we'll make it what is 710 715 725 730 740 745 let's capture that at least so we've got 710 uh 715 what else 725 730 uh 725 so 730 then 740 then 745 we know there is a and we don't know somebody else we don't know who was here I believe that this was C c f and we don't know this person so this is a board okay which is the board and then we also have the rooms so we have room 101 we have room 102 we have room 103 but at this point in time we don't know how many people are there in the room you know the total number of people which is seven but I don't know how many are there in room one 1 one 02 10 Z3 so I'm not not going to draw these lines here but we'll leave it here so we we have got these three rooms okay let's crack the story now when we are trying to capture information and start doing this resolution some of some of you will start reading the 51 and figure out okay I'm going to do I I'm going to leave it I'll come to this later I will come to the later I won't come to anything later if I've read something I'm going to do something about it either it is going on to the board or going on my here it's going to that information in some way any information if I've read something it's going to go on my sheet Al that is my rule I don't want to say that okay I'll come back to you later this come back to you later but doesn't happen I will in some fashion I will capture this information somewhere okay let's read I was a third person to enter room 10 Z1 okay this is a good one so at least we know that at least third three people are there the third person to ENT the room is B there could be somebody after B well there are total seven but at least we know that before B two people have to be there now there's one another thing that you could do is that to keep do resolve as soon as you get one clue is there anything else that you can figure out from here okay maybe you'll start saying that okay there has to be two people before B at least two people so obviously B cannot be here because there is only only one person before B if it's very simple to understand that right so if for example for some reason uh B lands up here it's not possible the before B there's only one a but before B we need to have two person so it this is guaranteed that b cannot be here you could you could probably write B here and say that b is not in this particular position you could do that right be you could or you will say that okay right it's understand I can understand this I will leave it like this but okay so basically B cannot be here all but I'm going to write it small resu I was the last person to enter the room that I was allowed to to I don't know which room but C was the last person so I've read it I'm going to write it somehow the C was the last person in the room so let's put it before c there was somebody and after C there was nobody so let's put a Glock and say that's a block now you could write this fashion anyways so you could say right C is the last person to enter I I don't want to write it like this I don't want to write any English I'm just going to use quotes so these are these are my quotes it could even be the after C there is nobody that is X you could you could write that also C is the last person whichever way you want to write you write it because these are your consumption I'm I have captured the information I was the only person in the room that I allowed to do okay one somebody's alone e is alone so let's put a e and put a block here we don't know where e is it can be 102 or 103 let's capture this F says three people including a were already in the room that I was allowed her to when entered it okay three people were there so we we don't know which room it could be 101 also I mean b is the third one it not say that be is the last one so we'll just capture the information on the right hand side like this three people already there when include who was the thir three people one of them was a now a is the first person to come in the venue they immediately allowed to the room so a would be here now this is fantastic okay great we don't know which room G says I was one among the two candidates allowed room 102 oh wonderful 102 is two candidate and G is in 102 let's put G this side G has to be 102 how the one among the one2 now okay we have we can he has to be alone the only way he is alone is here is is is alone here he is alone there's only two people where will this go the only place for it to go is 101 there has to be four there is f here there is a here okay this is done e is done we need to figure out C is the last person oh this can't be one1 one2 C has to be here okay this is done which means G has to go this is done here okay let's say G has gone all is over who is left a b c d d is left okay now we crack the rooms we crack the rooms you could at this point in time immediately start solving those question on the rooms you could do that but you could also figure this out okay now how do I use this information given to me and then crack the story we could easily crack the story okay we have we can see f and c they are almost kind of a block we can see C and F what we know is we we there is an a there's a a so what we know here is before F D and B has to come before c g has to be there so before CNF it is guaranteed that DB and G has to be there so DB and G and in fact the these three position would be D and B and within DB there's a sequencing D has to come immediately D B has to come after d now we don't know the relation between G and these two fellows but because across the room we don't know story but somewhere here we need to also have G that's a story that's a story and then what do it means that means that our e will we the a d and e e is left the only position for e is here and we cracked it okay so let's now s this information and then go ahead and answer the question and this is fun as soon as you uh uh as soon as you get this question everything is done for example what can be SED out of the room where D was allotted to we know D is allotted to Room 101 we know that definitely do one1 three marks this is fun these are the kind of question when you know that uh if you if you answer the question we kind of got everything in place okay let's look at next one who else was in room 102 when G entered G who else was in room 102 when G entered G entered first nobody was there before G entered after GC no one was there so this is done and now I think that this this also is is is possible so we yeah yeah okay there you go where is question number three I miss question number three so let's go and look at what is first question number three when did E reach the venue e reached the venue he was the last person reached the venue right yeah 7:45 okay so he was 7:45 there you go sorry okay I miss question number three on my PBT okay anyway now we have if condition we have answered all this now we can tingle with this uh one this board this I'm going to call this my mother board in the sense that this is a main board since we have answered everything whatever we do here it doesn't matter if G entered the venue before d g entered the venue before d g entered the venue before D so then G ENT the venue before D so B is after the there you go there you go so this has to be G D and B when it be under the venue that has to be 7:25 a.m. there you go done so all we got to do is to be systematic Let's do let's look at this set oh oh all right so 7:45 sorry okay sequencing game to cat 2019 so in this uh uh the the game of sequencing it's kind of working with two things okay so we have to work with an assignment along with sequencing sequencing and assignment assignment means assignment means assigning one particular person a particular character I use the word character or assigning some we'll just SOL this set as always we will read it we'll deify the information supermarket has placed uh has to place 12 items A2 to shelves numbered 1 to 16 okay there is 12 it 12 shell number 1 to 16 that mean four will be empty set now how do I figured out what is empty set the way in which I will understand the empty set is also pieces so we have got a and then till L and then we have this empty set four of them I'm just going to call x four X's so write it like pieces only so we have got pieces a a b c d up to L and there are four pieces XS XX five of the item are type of so there you go we have got one more value the five items are type of biscuit three are type of candid and the rest are type of s so five biscuits three candies total is 12 5 plus three is eight the four savories okay so immediately rule the game is happening only one item can be placed in a shelf nice nice sequencing only one item item are to be placed such that all the items of the same type of cluster together with no empty Shelf between items of the same type oh that's wonderful all the biscuit has to be together all the all the candies have to be together all the savories have to be together that's that's a block okay and then he says that okay and at least one empty shell between two different types of items oh this x has to come in between this so whatever his item is there Whatever item is there at least one X has to be there at most two empty shelf can have consecutive number maximum is to ex either one or two excess this is this is what we understood then we then we got this as a rule then we have three as a main rule we have got four as a rule and then you got all the information A and B are to be placed consequently number shelf I have to be consequent number shelf D and G okay so then we have got seven rules which is going to give us addition information eventually we allow to crack the sequencing we also have to crack the assignment of of which one is biscuit which one is uh this one assignment plus sequencing no problem okay but what is the question wanting us to do how many different ways can be Arrangement done okay first of all we there is no one way there's multiple ways which of the following item is not a biscuit all right which of the following can represent can represent is not even saying will represent so there are multiple cases possible arrangement of empty shelf I can already see everything having a 12 is it 12 definitely empty okay okay which of the following is necessarily true all right the only way to do is let's bit down as much as we can if there are multiple cases we'll have to figure out sh shall we write down these cases separately if there are two cases three cases we'll just write those cases right makes sense okay so let's start okay first thing first in our in our working sheet we're going to make the thing we have to arrange the 16 items together no so let's first put 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 no problem 1 2 3 4 somebody saying that yeah write like this you feel like you are in control in lot many cases now when you when this will automatically slow your thing down and you bra that you you're telling your mind look I am actually solving this we know a few things we know there is a b so on and so forth till X and we have got this four pieces four X's there are five biscuits and all the biscuits have to be together we have got three candies uh rest of savories the four S is I'm putting this in small letter because we got a B here these are small letters okay so just avoid confusion okay you could also write this biscuit as like this also that's that's another way to write this okay now we know that between these these blocks items there has to be at least one empty okay at least one and then we know that either is one empty or two empty fellows two XS cannot be three CH let's start if I'm reading something I'm writing it down I'm doing something about it either it get gets here or we will have a working see we have a working area this is this like a motherboard these are rued board and we have got working area will work working that's it so we A and B have to be placed consecutively numbered shelf in increasing order so A and B are together in increasing order which means they become a block like this they have to be together this blocking means they are together in increasing order so first of all couple of things because all these guys have to be together it is we know for a fact that A and B belong to one item either biscuit or candies or savories I and J are to be placed in conse numbered shelf both higher number than the Shelf in which A and B are kept okay one by one I and J have to be the plac in conly numbered shelf now some of the silly mistake that you can make here is look at here this STS that shelves in increasing order A and B is in increase order but that is not talked about in I and J they are just cons numbered Shelf and uh and both higher number than the Shelf in which A and B are kept okay let's capture this somewhere after this we need to have I in is already a block but I'm putting a comma here you know why I'm putting a comma just say that they are interchangeable okay okay all right this does not Ur now A and B I and J can be the same group A and B I andj can be different group provided some X is there in between okay we don't know at this point in time okay okay d andf are savories are to place conse numbered shelf in increasing order after all biscuits and candies the person arriving at the end is saies so now couple of things so first of all let's working area so D andf are have to be place like this and these are all savories we know there are four savories number two biscuits candies and then SA capture all the information neatly on the working area yeah feel you have to feel like you are in control we are in control we just create a illusion of control lot of things will work okay okay anything else so far so good this are the towards end somewhere here okay K is to be plac in Shell number 16 thank you so much so K is here oh K is the last person now we know that the the the last fellow is are saies K has to be Savory second of all we also know that all the savories have to be together and DF are those other three fellows oh my God we got it we got it d e and f okay now let's put this as Savory Savory Savory Savory or you could even write d as Savory Savory and savory you could put like that also up to you now we know that before a a group of biscuit saies there has to be at least one X so we know for a sure that 12 is X okay all right okay this is done so whichever is done let's correct this this is done remove this in the working area whatever is over now what whatever REM it okay so we know that exactly what we are working we are making it foolproof see we we don't have unbelievable capability of everything happening yet we will just we will have to feel like we are in control we have to feel we are in control all right okay that's all in just in control ah we've got all right okay L and J are of same type okay okay okay L and J we already have a J L actually has to be on the same type oh L and J has to be on the same type so L and J so all all of these are some group all all these fellows are in some group same group okay L andj is same type L if L andj is same type I andj will all be same type l i j is on the same group okay now the only possibility for Li J okay let's just say that this belongs to this group let's put it like this it belong this particular group Li J can be the three saies or they can can be the three biscuits anything is possible okay H is an item of a different type okay H is an item of different type h is a different type than l so let's capure this so l and i i j this is one type and H is a different type all right all right okay C is a candy oh c is a candy oh okay okay okay c c c is a candy so C is a candy let's let's stop let's stop okay let's look at there has got to be three cies C is already a Gandy these three fellows are already in a group l i j have to be together C is already a candy what that means is that apart from C we only have two more candies left so if L is in it is going to take all the three together now we cannot have a situation where these three are candies this can't be candy this can be C can candy candy because because he is also a candy the only three candies that tells us this is biscuit this is a biscuit group and H is not a biscuit therefore H has to be a candy now H is a candy C is a candy H is a candy C is a candy H is a candy C is a candy only one more candy this be left now what about A and B A and B are together now which means if a is a candy then B has to be a candy but we also already know the C is a candy H is a candy we can't have four candy that tells us that these are all biscuits this also biscuit P biscuit candy oh we got candy L is to be PL Okay C is a candy is to be placed in a shell preceding two empty shelves preceding before okay now there's a candy it has to be sea this is sea story we are writing in this working area we are writing in this working area we writing working area along with C we have got H is going to come somewhere after the C it's just going to come it's it's a part of this group L is to be placed in a shelf preceded by exactly one empty shelf oh L has to be placed step L is this group okay L has to be placed exactly before the preceding step and all of these are biscuit and we know that A and B is going to be is going to be first and IJ in some order okay this is ours oh we we have cracked we have cracked we have cracked we have cracked our biscuit story and we know the candy story The Candy story requires two C and C that's a candy who is the candy it's is a candy and who is left a b c d e f g g is left G is left so then G and H in some order oh this is a biscuit story this is a candy story we got it we got it now what we already actually we know is that the candy group and a biscuit group can rearrange here we taken care of all the X's there are four xes 1 2 3 4 ex's no more exes this tells us there are two cases at this point in time now we now mind and all is not working properly we are like our mind is like simple mind so what we'll do is create the two cases here no problem 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 x d s e s f s KS let's start with starting with biscuit this is biscuit sorry l a b i j or j i so this can be i j or j i these are all biscuit biscuit you could probably write biscuit biscuit okay right this a biscuit family a biscuit family these are biscuit family and then the candies two x's and our c is a candy G is a candy H is a candy okay we can start the other way around we can start with cross cross C candy Okay g and H could be in any order by the way sorry about that GN could be in any order it not necessary that GN has be we don't know the order between GN so this this could be G this could be H or this could be H or this could be G this is candy candy okay same C uh G or H or H or G candy candy candy and we have got l a b i or J or J or I we have got this are biscuit biscuit biscuit biscuit why am I saying biscuit biscuit biscuit biscuit okay we've got it we have got it we have got it we have got it we have got the story this is all we need to answer all the questions and this is like now when when when you crack this the feeling is different oh this is too big let's okay let's start how many different ways can item be arrange first of all there is 2 into two the the these two these two four ways here same case these two these two can be arranged that is two into two four ways total number of ways will be eight three marks okay let's go and do the second uh question take this fellow here cut this little bit okay which of the following is not a type of biscuit B is a biscuit a is a biscuit L is a biscuit what is L ah L is a biscuit of course L is a biscuit g b is not a biscuit G because G is a cand we know this we know this okay so let's look at this particular question oh this is very exciting you know I think that you should just start enjoying DLR okay DLR is fun which of the following can represent number of empty shelf all right so we basically we could basically take the empty shelf here what the empty shelf 1 7 8 12 1 7 8 12 this one is what 1 2 6 and 12 1 2 6 and 12 so 1 2 six and 12 I can see it here okay next question which of the following is necessarily true when it said necessarily true mean it has to be true here it has to be true here also there are two empty shell between biscuit and candies between biscuit and candies there is two two empty shelf here but there is only one empty shelf here not necessarily true this the first one goes second one says all candies are kept before biscuit all biscuit are kept not possible it can be both either either this or this and is this there are at least four shelves between B and C C is here B is here one shelf two shelf three shelf four Shelf at least four shelf C is here B is here one shelf two shelf three shelf four self Five shelves at least four shelf there you go answer this question is answer Choice number four this how you do it now I realize that I was supposed to do three sets but it's already taken a lot of time now I will do little more slightly more complicated set in the next lesson I'll do about I don't know I don't know how many lesson maybe about 10 lesson and I will post the next lesson this coming Monday so we'll do Monday Wednesday Friday on Monday Friday two lessons per week I'll do as many as we can and I hope that this makes sense and you let me know if you if you if you want me to kind of do more but I was supposed to do one more I thought that it's going to take a little time but I'll do the next one in the next lesson probably next lesson coming on Monday goodbye