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
GMAT Prep (Mutiples) Pract2
This topic has expert replies
Source: Beat The GMAT — Problem Solving |












