SSAT Math Question 373: Answer and Explanation
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Question: 373
1. For a certain number, 40% of that number is 240. What is 60% of that number?
- A. 60
- B. 100
- C. 260
- D. 360
Correct Answer: D
Explanation:
D
First, set up a proportion to find the number: 
. Cross multiply and divide both sides by 40: x = 600. Now, set up a proportion to find the requested value: 
. Cross multiply and divide by 60: y = 360.
You can use logic. If 40% of a number is 240, 60% of the number will be greater than 240 but not by a factor of 10. Eliminate choices (A), (B), and (E). An increase from 40% of 240 to 60% of 240 is certainly going to add more than 20. Eliminate choice (C).