GMATPrep number properties

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]

Want to Beat GMAT.
Always do what you're afraid to do. Whoooop GMAT

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lilu: Master | Next Rank: 500 Posts; Posts: 148; Joined: Wed Dec 10, 2008 5:13 pm; Location: SF, CA; Thanked: 12 times

by lilu » Fri May 01, 2009 8:14 pm

Thank you, kanha!!
The OA is B

The more you look, the more you see.

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