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Is a two-digit positive integer \(xy,\) where \(x\) is the tens digit and \(y\) is the units digits, even?

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Is a two-digit positive integer \(xy,\) where \(x\) is the tens digit and \(y\) is the units digits, even?

by VJesus12 » Sat May 30, 2020 2:55 pm

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Is a two-digit positive integer \(xy,\) where \(x\) is the tens digit and \(y\) is the units digits, even?

(1) \(x\) is an even number
(2) The greatest common factor of \(x\) and \(y\) is 1

[spoiler]OA=C[/spoiler]

Source: GMAT Club Tests
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