Selected MCQ

Current Question
If P is 30% more efficient than Q and P takes 23 days, Q takes ____.
  • A. 9
  • B. 11
  • C. 23
  • D. 13
Correct Answer: D
Explanation:
Q’s time = 23 × 1.3 = 30 approx.
Related Question 1
Kamal completes work in 20 days. Suresh is 25% more efficient. Time taken by Suresh is ____.
  • A. 14
  • B. 16
  • C. 15
  • D. 11
Correct Answer: B
Explanation:
Efficiency ↑25% → time = 20/1.25 = 16 days.
Related Question 2
In a camp, food for 500 men lasts 10 days. After 5 days, 200 more men joined. How long will the remaining food last?
  • A. 3 days
  • B. 8 days
  • C. 5 days
  • D. 1 day
Correct Answer: D
Explanation:
Remaining food consumed faster → lasts 1 day.
Related Question 3
8 children and 12 men complete work in 9 days if each child takes twice time of a man, time required by men alone ____.
  • A. 6 days
  • B. 8 days
  • C. 10 days
  • D. 12 days
Correct Answer: D
Explanation:
Convert child efficiency to men.
Related Question 4
12 children take 16 days to finish work. Time for the same work with a different number is ____.
  • A. 3 days
  • B. 4 days
  • C. 6 days
  • D. 8 days
Correct Answer: C
Explanation:
Work is inversely proportional.
Related Question 5
Three flags of different coloRs. Number of signals using 1 or more flags is ____.
  • A. 6
  • B. 9
  • C. 15
  • D. 18
Correct Answer: C
Explanation:
Total combinations excluding empty = 2³ −1.