ISEE Mathematics Achievement Question 48: Answer and Explanation

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Test Information

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.

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