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GMATPrep number properties

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Master | Next Rank: 500 Posts
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by lilu » Fri May 01, 2009 3:01 pm
Please let me know how to solve this question.
I'll post the OA after a few replies.
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Source: — Data Sufficiency |
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Re: GMATPrep number properties

by kanha81 » Fri May 01, 2009 3:18 pm
lilu wrote:Please let me know how to solve this question.
I'll post the OA after a few replies.
e=even, o=odd

(i) n + m = odd
a) n=e, m=o: lhs=e+o = o = o = rhs
b) n=o, m=e: lhs=o+e= o = o = rhs

insuff

(ii) n + m = (n^2) + 5
n=e: rhs=(n^2) + 5 = o => lhs=e+o = o. true
n=o: rhs=(n^2) + 5 = e => lhs=o+o = e. true;

suff. hence, [spoiler][/spoiler]
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by lilu » Fri May 01, 2009 8:14 pm
Thank you, kanha!!
The OA is B
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