SAT Math Multiple Choice Practice Question 464: Answer and Explanation

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Question: 464

5. If n is an even integer, which of the following must be an odd integer?

A. 3n - 2
B. 3(n + 1)
C. n - 2
D.
E. n2

Correct Answer: B

Explanation:

B There are variables in the answers, so this is a question for the technique of Plugging In. If n = 2, then answer choice B is the only answer choice that gives you an odd integer: 3(n + 1) = 3(2 + 1) = 3(3) = 9. Plugging In makes this problem much easier.

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