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Cubed Root Data Sufficiency Question

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Source: — Data Sufficiency |
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Re: Cubed Root Data Sufficiency Question

by palvarez » Fri Nov 13, 2009 9:55 pm
bschoolerrj wrote:Is x an integer?

1) x^3 is an integer
2) cubed rt (x) is an integer

I was having a tough time on the first statement. Is there a time when x^3 is an integer, but x is not? Maybe it's the way I'm approaching the problem.

Thanks!
Rephrase (1) as follows.

(1) if k is an integer, is cubic root of k an integer?

Sometimes, it is; some times, it is not. Insufficient.
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