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Is n an integer greater than 4?

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Intern
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Joined: 24 Jan 2014
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Kudos [?]: 6 [0], given: 7

Is n an integer greater than 4? [#permalink] New post 08 May 2014, 07:40
11. Is n an integer greater than 4?
(1) 3n is a positive integer.
(2) n/3 is a positive integer.
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Magoosh GMAT Instructor
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Re: Is n an integer greater than 4? [#permalink] New post 08 May 2014, 10:54
Expert's post
Ravithj wrote:
11. Is n an integer greater than 4?
(1) 3n is a positive integer.
(2) n/3 is a positive integer.

Dear Ravithj,
I'm happy to respond. :-)

First of all, my friend, this post is wildly miscategorized. This question should be posed in the "quantitative section", with the other DS questions.

Because it's a simple question, I will answer.
Statement #1: From this first statement, it's not even guaranteed that n is an integer --- for example, n = 5/3 would work as possible value. But n could be an integer greater than 4, so from this statement, alone and by itself, we can draw no conclusion. Insufficient.
Statement #2: From this statement, we know that n must be an integer and a multiple of 3 --- n could be 3, 6, 9, 12, etc. Most of those are integers greater than 4, but 3 is less than 4. From this statement, alone and by itself, we can draw no conclusion. Insufficient.
Combined statements: Both n = 3 and n = 6 are consistent with both statements. The first gives a "no" answer to the prompt, and the second, a "yes" answer. Even with the information of both statements, we are not in a position to give a definitive answer to the prompt question. Both statements combined are Insufficient.

Answer = (E)

Here's a blog about GMAT Data Sufficiency tips:
http://magoosh.com/gmat/2013/gmat-data- ... ency-tips/

I hope all this helps.
Mike :-)
_________________

Mike McGarry
Magoosh Test Prep

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Re: Is n an integer greater than 4?   [#permalink] 08 May 2014, 10:54
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Is n an integer greater than 4?

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