SAT Math Multiple Choice Practice Question 334: Answer and Explanation

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Question: 334

4. The average (arithmetic mean) of four different positive integers is 20. What is the greatest possible value of any of these integers?

A. 68
B. 70
C. 73
D. 74
E. 77

Correct Answer: D

Explanation:

D First write an equation to find the average.

Multiply by 4:

If you want a to be as large as possible, make b, c, and d as small as possible. You are told that they are all different positive integers:

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