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Is a even?

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Source: — Data Sufficiency |

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by Jay@ManhattanReview » Tue Oct 03, 2017 11:13 pm
Vincen wrote:Is a even?

(1) 2a is even.
(2) √a is even.

The OA is B.

How can I use the square root to know that a is even?
(2) √a is even => a = (even)^2 = even*even = even

The correct answer: B

Hope this helps!

-Jay

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