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\(m = 4n + 9,\) where \(n\) is a positive integer. What is the greatest common factor of \(m\) and \(n?\)

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by Vincen » Wed Oct 28, 2020 8:14 am

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\(m = 4n + 9,\) where \(n\) is a positive integer. What is the greatest common factor of \(m\) and \(n?\)

(1) \(m = 9s,\) where \(s\) is a positive integer.
(2) \(n = 4t,\) where \(t\) is a positive integer.

Answer: A

Source: Manhattan GMAT
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