Online Study - Complete Placement Solution Lecture Notes

Introduction

• Welcome by Pratik Sirvastava
• Focus on solving placement examination questions from Accenture, TCS, Wipro, Tech Mahindra
• Aim to solve questions in under 30 seconds using shortcut methods

Questions and Solutions

Question 1

• Problem: 2 men and 3 women complete a work in 15 days. How long will 6 men and 9 women take?
• Solution:
  • Multiply both sides by a factor of 3.
  • Result: 15 days / 3 = 5 days

Question 2

• Problem: 6 men and 8 women complete a work in 10 days. How long for 15 men and 20 women?
• Solution:
  • Multiply both sides by 2.5.
  • Convert 2.5 to fraction: 5/2.
  • Result: 10 days / 2.5 = 4 days

Question 3

• Problem: Ages of A and B are in the ratio of 3:5; 9 years ago the ratio was 12:23. What is A's present age?
• Solution:
  • Assume A's age = 3x, B's age = 5x.
  • Check factors of 3.
  • Result: Present age of A = 24 years

Question 4

• Problem: Present ratio of mother to daughter is 7:1; 4 years ago it was 19:1. Mother's age now?
• Solution:
  • Subtract 4 years: Current ages become 46 and 42.
  • Result: Mother's age = 42 years

Question 5

• Problem: Find the remainder when dividing by 100.
• Solution:
  • Calculation leads to remainder = 0.

Question 6

• Problem: What is the remainder when 2^192 is divided by 6?
• Solution:
  • Remainder = 4.

Question 7

• Problem: A sum doubles in 3 years; how long to become 16 times?
• Solution:
  • 4 times 3 years = 12 years

Question 8

• Problem: A sum triples in 4 years; how long to become 81 times?
• Solution:
  • 4 times 4 years = 16 years

Question 9

• Problem: A dealer sells a weight less than actual at 20% profit. Calculate profit percentage.
• Solution:
  • Cost Price for 90 grams = 90 rupees, Selling Price = 120 rupees.
  • Profit = 30 / 90 * 100 = 33.33%

Question 10

• Problem: Ramesh sells items at cost price but uses 920 grams for 1 kg. Profit percentage?
• Solution:
  • Cost Price = 920 rupees, Selling Price = 1000 rupees.
  • Profit = 80 / 920 * 100 = 8.69%

Question 11

• Problem: Jaya took a loan of 10,000 at 20% per annum. Payments?
• Solution:
  • Total due at end of 3 years = 4080 rupees.

Question 12

• Problem: Arun and Bharat can make 720 toilets in 20 days. Find efficiencies.
• Solution:
  • Their efficiencies calculated lead to total toilets made = 348 toilets.

Workshop Announcement

• Two-week Aptitude and Reasoning workshop:
  • Starts on 2nd August, daily from 7 PM to 8 PM.
  • Certificate upon completion.
  • Cost: 199 rupees.
  • Focus on shortcut methods and problem-solving techniques.
  • Link to enroll is in the description.

Conclusion

• Emphasis on the importance of understanding concepts over memorizing formulas.
• Encouragement to join the workshop for better preparation.