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# If x is an integer, and 3x^2 is even, then which of the following must

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Joined: 02 Sep 2009
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If x is an integer, and 3x^2 is even, then which of the following must  [#permalink]

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24 Jan 2019, 02:24
00:00

Difficulty:

(N/A)

Question Stats:

40% (00:04) correct 60% (00:32) wrong based on 5 sessions

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If x is an integer, and 3x^2 is even, then which of the following must be true?

A x + 3 is even
B x^2 – 1 is even
C x + 4 is even
D x^2 is even
E x^2 is odd

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Re: If x is an integer, and 3x^2 is even, then which of the following must  [#permalink]

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24 Jan 2019, 02:36
Bunuel wrote:
If x is an integer, and 3x^2 is even, then which of the following must be true?

A x + 3 is even
B x^2 – 1 is even
C x + 4 is even
D x^2 is even
E x^2 is odd

3x^2 = even

x^2 must be even.

In this case both C and D will be correct answer.

Bunuel , kindly review it.
Re: If x is an integer, and 3x^2 is even, then which of the following must   [#permalink] 24 Jan 2019, 02:36
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