If \(X\) is an integer, does \(7^X+9^{X+3}\) end with a \(0?\)

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by M7MBA » Sun Nov 28, 2021 1:44 am

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If \(X\) is an integer, does \(7^X+9^{X+3}\) end with a \(0?\)

1) \(2^X\) is odd.
2) \(2X+2\) is even.

Answer: A

Source: e-GMAT

Source: Beat The GMAT — Data Sufficiency | Sun Nov 28, 2021 1:44 am

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