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# Is B an integer? (1) B^3 is an integer

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Is B an integer? (1) B^3 is an integer [#permalink]  04 Feb 2012, 17:29
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59% (01:42) correct 41% (00:48) wrong based on 129 sessions
Is B an integer?

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

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Last edited by Bunuel on 04 Feb 2012, 17:35, edited 1 time in total.
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Re: Algebra Integer check [#permalink]  04 Feb 2012, 17:33
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Is B an integer?

(1) B^3 is an integer --> B certainly can be an integer but it also can be cube root of an integer, for istance $$\sqrt[3]{5}$$ or$$\sqrt[3]{7}$$. Not sufficient.

(2) (B) ^ 1/3 is an integer --> $$\sqrt[3]{B}=integer$$ --> $$B=integer^3=integer$$. Sufficient.

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Re: Is B an integer? (1) B^3 is an integer [#permalink]  16 Apr 2015, 02:02
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Re: Is B an integer? (1) B^3 is an integer   [#permalink] 16 Apr 2015, 02:02
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# Is B an integer? (1) B^3 is an integer

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