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zueswoods
- Senior | Next Rank: 100 Posts
- Posts: 32
- Joined: Fri Sep 09, 2011 10:05 am
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Hi
This is a question I encountered:
Is s divisible by 32?
(1) S is divisible by 16
(2) s is divisble by 4
My technique (learned from mgmat) is to simply find the primes and see if we do find 2^5 (without any overlaps).
32 = 2^5
(1) 16 = 2^4 not suff
(2) 4 = 2^2 not suff
Together, no new information is gained so insuff - because of overlap.
Offical Answer: E
HOWEVER what if statement 2 was "S is divisble by 24"
24 = (2^3)(3)
Would the answer still be E?
This is a question I encountered:
Is s divisible by 32?
(1) S is divisible by 16
(2) s is divisble by 4
My technique (learned from mgmat) is to simply find the primes and see if we do find 2^5 (without any overlaps).
32 = 2^5
(1) 16 = 2^4 not suff
(2) 4 = 2^2 not suff
Together, no new information is gained so insuff - because of overlap.
Offical Answer: E
HOWEVER what if statement 2 was "S is divisble by 24"
24 = (2^3)(3)
Would the answer still be E?
