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is m odd?

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by sanju09 » Thu Mar 22, 2012 12:36 am
If m is an integer, is m odd?
(1) m/2 is not an even integer.
(2) m - 3 is an even integer.
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Source: — Data Sufficiency |
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by killer1387 » Thu Mar 22, 2012 12:57 am
sanju09 wrote:If m is an integer, is m odd?
(1) m/2 is not an even integer.
(2) m - 3 is an even integer.
IMO b
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by sam2304 » Thu Mar 22, 2012 12:58 am
1.m/2 is not an even integer
1/2 = 0.5 => m is odd
6/2 = 3 => m is even

2. m-3 = even
m = even + 3 => odd

IMO B.
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by Anurag@Gurome » Thu Mar 22, 2012 2:35 am
sanju09 wrote:If m is an integer, is m odd?
(1) m/2 is not an even integer.
(2) m - 3 is an even integer.
(1) m/2 is not an even integer.
If m = 10, then m/2 = 5, an odd integer. Here m is an even integer.
If m = 5, then m/2 = 5/2, a fraction. Here m is an odd integer.
No definite answer; NOT sufficient.

(2) m - 3 is an even integer.
3 is an odd integer, so it means m - odd = even or m = odd + even = odd; SUFFICIENT.

The correct answer is B.
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by ranjeet75 » Mon Mar 26, 2012 6:37 am
stat 1): m/2 = odd integer
so, m = 2 * odd integer
so, m = even integer
so, answer to the question "is m odd" is NO.

Hence Sufficient.

(In question stem it is said that m is an integer so m can't be a fraction)

In my view answer should be D

Please tell my mistake if I am wrong.

[quote](1) m/2 is not an even integer.
If m = 10, then m/2 = 5, an odd integer. Here m is an even integer.
If m = 5, then m/2 = 5/2, a fraction. Here m is an odd integer.
No definite answer; NOT sufficient.

(2) m - 3 is an even integer.
3 is an odd integer, so it means m - odd = even or m = odd + even = odd; SUFFICIENT.

The correct answer is B.[/quote][/quote]
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by DCJen » Mon Mar 26, 2012 6:50 am
ranjeet75 wrote:stat 1): m/2 = odd integer
so, m = 2 * odd integer
so, m = even integer
so, answer to the question "is m odd" is NO.

Hence Sufficient.

(In question stem it is said that m is an integer so m can't be a fraction)

In my view answer should be D

Please tell my mistake if I am wrong.
Ok, so M is an integer. But M/2 isn't necessarily an integer.

Here's the wording:
(1) m/2 is not an even integer.

"not an even integer" means that it could be an odd integer or a fraction.
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