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Source: — Data Sufficiency |
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by rijul007 » Fri Nov 04, 2011 10:15 am
Statement 1:
m/2 could be decimel or odd

3/2 = 1.5 (not even)
6/2 = 3 (not even)

Insufficient


Statement 2:
m-3 is even
m = odd

Sufficient

Option B
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by Anurag@Gurome » Sat Nov 05, 2011 5:33 am
gmatblood wrote:If m is an integer, is m odd

(1) m/2 is not an even integer
(2)m-3 s an even integer

IMO: B
(1) m/2 is not an even integer implies m may be an odd integer or a fraction; NOT sufficient.

(2) m - 3 is an even integer implies m - 3 can be even only if m is odd.
Example: If m is odd, say m = 7, then m - 3 = 7 - 3 = 4 (even)
If m is even, say m = 4, then m - 3 = 1 (odd)
So, m is definitely an odd integer given that m - 3 is even; SUFFICIENT.

The correct answer is B.
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