If $x$ and $y$ are positive integers, is the product $xy$ even?

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by M7MBA » Wed Sep 09, 2020 6:34 am

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If $x$ and $y$ are positive integers, is the product $xy$ even?

(1) $5x - 4y$ is even.
(2) $6x + 7y$ is even.

Answer: D

Source: GMAT Prep

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Source: Beat The GMAT — Data Sufficiency | Wed Sep 09, 2020 6:34 am

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