Selected MCQ

Current Question
P, Q, and R take 24, 6, and 12 days, respectively. Time together is ____.
  • A. 2
  • B. 3 3/7
  • C. 4¼
  • D. 5
Correct Answer: B
Explanation:
Sum of rates gives 3 3/7 days.
Related Question 1
P completes work in 24 days, Q in 9 days, R in 12 days. Time taken together is ____.
  • A. 10
  • B. 9
  • C. 11
  • D. 12
Correct Answer: A
Explanation:
Sum of rates gives time = 10 days.
Related Question 2
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 3
If Q alone does work in 12 days and P is twice as fast, time together is ____.
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Correct Answer: D
Explanation:
The combined rate gives 4 days.
Related Question 4
If P works alone takes same time as Q and R together, time taken by P is ____.
  • A. 30 days
  • B. 25 days
  • C. 20 days
  • D. 15 days
Correct Answer: B
Explanation:
Based on the equality of work rates.
Related Question 5
P and Q complete work in 20 and 12 days. Time together is ____.
  • A. 5 days
  • B. 10 days
  • C. 15 days
  • D. 12 days
Correct Answer: B
Explanation:
The combined rate gives 10 days.