n is positive integer. Is n odd? 1) 3n is odd 2) n+3 is even : Quant Question Archive [LOCKED]
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# n is positive integer. Is n odd? 1) 3n is odd 2) n+3 is even

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n is positive integer. Is n odd? 1) 3n is odd 2) n+3 is even [#permalink]

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06 May 2006, 02:47
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

n is positive integer. Is n odd?

1) 3n is odd
2) n+3 is even
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Joined: 13 Dec 2005
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06 May 2006, 03:58
D

1 . 3 * n = odd means n is odd because only odd * odd = odd sufficient

2. n + 3 = even means n is odd because odd + odd =even sufficient
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25 May 2006, 23:24
D

1) O*O=odd but O*E=even when 3*n=odd hence n is odd
2) O+O=even and O+E = Odd. when 3+n=even therfore n is odd
25 May 2006, 23:24
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