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GMAT Prep (Mutiples) Pract2

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by aatech » Tue May 13, 2008 12:09 pm
1 - not suff

n=6, so n+6= 12 => multiple of 3 but "n" is not multiple of 15
n=45, so n+6=51 => "n+6" multiple of 3 and "n" multiple of 15

2 - not suff

n is multiple of 20 => means n is multiple of 5
n+6 is multiple of 3 means n is multiple of 3

together "n" is multiple of 15
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