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# Is n an integer? (1) n/3 is an integer (2) 2n is an integer

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Manager
Joined: 04 Apr 2010
Posts: 88

Kudos [?]: 67 [0], given: 17

Schools: UCLA Anderson
Is n an integer? (1) n/3 is an integer (2) 2n is an integer [#permalink]

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22 Jun 2010, 15:16
00:00

Difficulty:

25% (medium)

Question Stats:

83% (00:21) correct 17% (00:24) wrong based on 40 sessions

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Is n an integer?

(1) n/3 is an integer
(2) 2n is an integer
[Reveal] Spoiler: OA

_________________

Kudos [?]: 67 [0], given: 17

Math Expert
Joined: 02 Sep 2009
Posts: 42599

Kudos [?]: 135579 [0], given: 12702

Re: Is n an integer? (1) n/3 is an integer (2) 2n is an integer [#permalink]

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22 Jun 2010, 20:35
Is n an integer?

(1) For $$\frac{n}{3}$$ to be an integer $$n$$ must be an integer --> $$\frac{n}{3}=integer$$ --> $$n=3*integer=integer$$. Sufficient.

(2) $$2n$$ is an integer --> $$n$$ may or may not be an integer, for instance $$n=0.5$$ or $$n=1$$. Not sufficient.

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Kudos [?]: 135579 [0], given: 12702

Manager
Joined: 28 Feb 2010
Posts: 167

Kudos [?]: 39 [0], given: 33

WE 1: 3 (Mining Operations)
Re: Is n an integer? (1) n/3 is an integer (2) 2n is an integer [#permalink]

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24 Jun 2010, 01:53
Yes....A it should be
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Kudos [?]: 39 [0], given: 33

Re: Is n an integer? (1) n/3 is an integer (2) 2n is an integer   [#permalink] 24 Jun 2010, 01:53
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