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22 Jun 2010, 16:16
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
83% (00:39) correct
17%
(00:29)
wrong
based on 130
sessions
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Not Attempted Yet
Is n an integer?
(1) n/3 is an integer
(2) 2n is an integer
(1) n/3 is an integer
(2) 2n is an integer
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
22 Jun 2010, 21:35
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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.
Answer: A.
(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.
Answer: A.
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30 Oct 2023, 22:08
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For n/3 to be an integer n must be an integer
For 2n to be an integer, n may or may not be an integer. (n=1/2 or n=3)
Answer = A
For 2n to be an integer, n may or may not be an integer. (n=1/2 or n=3)
Answer = A
