PSAT Math Multiple-Choice Question 363: Answer and Explanation

Question: 363

If the total weight of 31 identical medieval coins is approximately 16 ounces, which of the following is closest to the weight, in ounces, of 97 of these coins?

• A. 5
• B. 19
• C. 50
• D. 188

Correct Answer: C

Explanation:

C

Difficulty: Easy

Getting to the Answer: Set up a proportion and cross-multiply to solve:

Choice (C) is correct. Given that the choices are spaced far apart, you could have used estimating to answer this question. Since 97 is about 3 times 31, look for the choice that is about 3 times 16, which is 48. Only (C) is close.