ISEE Mathematics Achievement Question 48: Answer and Explanation
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Question: 48
6. If a certain job can be performed by 18 clerks in 26 days, the number of clerks needed to perform the job in 12 days is
- A. 24 clerks.
- B. 30 clerks.
- C. 39 clerks.
- D. 52 clerks.
Correct Answer: C
Explanation:
The correct answer is (C). The size of the job can be thought of this way: 18 clerks working for 26 days do 18 × 26 or 468 clerk-days of work. To do 468 clerk-days of work in only 12 days would require 468 ÷ 12 = 39 clerks.