Selected MCQ

Current Question
If 8 workers can complete a job in 15 days, how many workers are needed to complete it in 10 days?
  • A. 10
  • B. 12
  • C. 14
  • D. 16
Correct Answer: B
Explanation:
Work = 8×15 = 120 ⇒ workers = 120/10 = 12.
Related Question 1
If 9 workers can complete a job in 6 days, how many days will 3 workers take?
  • A. 12
  • B. 15
  • C. 18
  • D. 20
Correct Answer: C
Explanation:
Work = 54 ⇒ 54/3 = 18.
Related Question 2
If 12 men can complete a work in 10 days, how many days will 15 men take?
  • A. 6
  • B. 8
  • C. 10
  • D. 12
Correct Answer: B
Explanation:
Work = constant ⇒ 12×10 = 15×x ⇒ x = 8.
Related Question 3
A, B, and C can complete work in 8, 14, and 16 days. How many days will A alone take?
  • A. 13
  • B. 11
  • C. 12
  • D. 15
Correct Answer: A
Explanation:
Derived from partial work relation.
Related Question 4
A can complete the work in 12 days and B in 18 days. In how many days will they complete the work together ____.
  • A. 6 days
  • B. 7.2 days
  • C. 8 days
  • D. 9 days
Correct Answer: B
Explanation:
Combined work = (1/12 + 1/18) = 5/36 → time = 36/5.
Related Question 5
6 men and 8 women can complete the work in 10 days. In how many days can 26 men and 48 women complete the same work ____.
  • A. 4 days
  • B. 6 days
  • C. 2 days
  • D. 8 days
Correct Answer: A
Explanation:
Total work ∝ (men + women efficiency) × days; solve proportionally.