McGraw-Hill Education GRE 2019

Look at each term separately: you don’t know whether 3x is odd or even,

since you don’t know whether x is odd or even. However, whether y is odd

or even, 2y will always be even since 2y has 2 as a factor. So think of the

equation as:

3 x + even = even

From the addition and subtraction rules, you know that even + even = even.

Therefore, 3x must be even. For the product 3x to be even, the term must

have an even factor. 3 is not even, so x must be even.

SOLUTION: The correct answer is A and C

186 PART 4 ■ MATH REVIEW

03-GRE-Test-2018_173-312.indd 186 12/05/17 11:51 am