Selected MCQ

Current Question
15 cattle graze a field in 20 days. In how many days will 20 cattle graze the same field ____.
  • A. 30
  • B. 45
  • C. 60
  • D. 50
Correct Answer: B
Explanation:
Work ∝ cattle × days → 15×20 = 20×x.
Related Question 1
18 cattle graze a field in 12 days. 6 cattle graze 3 such fields in how many days ____.
  • A. 90
  • B. 72
  • C. 36
  • D. 108
Correct Answer: D
Explanation:
Work ratio method.
Related Question 2
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.
Related Question 3
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 4
P lays railway track in 16 days. Q does the same in 24 days. Together they finish in ____.
  • A. 9⅗ days
  • B. 9⅕ days
  • C. 9⅖ days
  • D. 10 days
Correct Answer: A
Explanation:
The combined rate yields 9⅗ days.
Related Question 5
In a hospital, injections last 15 days. If the number of patients increases, for how many days will they last?
  • A. 10
  • B. 15
  • C. 16
  • D. 12
Correct Answer: A
Explanation:
Increased consumption reduces duration.