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If x is an odd integer, which of the following is also an odd integer?

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Re: If x is an odd integer, which of the following is also an odd integer?

by Scott@TargetTestPrep » Sat Oct 31, 2020 1:10 pm
AAPL wrote: ↑
Tue Oct 27, 2020 10:15 am
 GMAT Prep

If x is an odd integer, which of the following is also an odd integer?

A. 2x
B. 4x + 2
C. x^2 + 3
D. x^2 + x + 3
E. x^2 + 2x + 1

OA D
Solution:

Since x is an odd integer, x^2 is also odd, and therefore, x^2 + x + 3 = odd + odd + odd = odd.

Answer: D

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