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# Is n an integer? 1) n^2=integer 2) n^(1/2) = integer

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Intern
Joined: 16 Jul 2008
Posts: 12
Is n an integer? 1) n^2=integer 2) n^(1/2) = integer [#permalink]

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02 Aug 2008, 15:06
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Is n an integer?

1) n^2=integer

2) n^(1/2) = integer
Senior Manager
Joined: 07 Jul 2005
Posts: 399
Re: Properties of numbers (data sufficiency) [#permalink]

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02 Aug 2008, 15:32
1) Insufficient. try sqrt(2) or 1

2) n^(1/2) = integer. only perfect squares satisfy this equation. Sufficient.

B
VP
Joined: 17 Jun 2008
Posts: 1328
Re: Properties of numbers (data sufficiency) [#permalink]

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02 Aug 2008, 22:32
djdela wrote:
Is n an integer?

1) n^2=integer

2) n^(1/2) = integer

square of any integer is integer and any fraction is fraction
(1) => sufficient

similarly ,square root of any integer is integer and any fraction is fraction => (2) is sufficient

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cheers
Its Now Or Never

Re: Properties of numbers (data sufficiency)   [#permalink] 02 Aug 2008, 22:32
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# Is n an integer? 1) n^2=integer 2) n^(1/2) = integer

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