Is x an integer ? : GMAT Data Sufficiency (DS)
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# Is x an integer ?

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Is x an integer ? [#permalink]

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15 Oct 2012, 12:12
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Is x an integer ?

(1) (3x+4) ( x+2) = 0

(2) x^2 is an even integer
[Reveal] Spoiler: OA

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Last edited by Bunuel on 23 Jan 2015, 05:48, edited 1 time in total.
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Re: Is x an integer ? [#permalink]

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15 Oct 2012, 12:21
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Is x an integer ?

(1) (3x+4) ( x+2) = 0 --> $$x=-\frac{4}{3}$$, so not an integer or $$x=-2=integer$$. Not sufficient.

(2) x^2 is an even integer. If $$x=2$$, the answer is YES but if $$x=\sqrt{2}$$, then the answer is NO. Not sufficient.

(1)+(2) Since if $$x=-\frac{4}{3}$$, then $$x^2$$ won't be an even integer, then $$x$$ must be -2, thus integer. Sufficient.

Hope it's clear.
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Re: Is x an integer ? [#permalink]

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23 Jan 2015, 03:37
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09 Feb 2016, 00:05
Hello from the GMAT Club BumpBot!

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Re: Is x an integer ? [#permalink]

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09 Feb 2016, 01:57
statement 2 alone is sufficient . If x^2 is an even integer , then x will be a integer .
The OA must be B .
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09 Feb 2016, 02:02
4d wrote:
statement 2 alone is sufficient . If x^2 is an even integer , then x will be a integer .
The OA must be B .

(2) x^2 is an even integer. If $$x=2$$, the answer is YES but if $$x=\sqrt{2}$$, then the answer is NO. Not sufficient.
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Re: Is x an integer ?   [#permalink] 09 Feb 2016, 02:02
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