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If K is an odd integer, which of the following is an odd integer?
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13 Dec 2021, 23:20
13 Dec 2021, 23:20
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Question Stats:
90% (00:42) correct
9% (00:30) wrong based on 11 sessions
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If K is an odd integer, which of the following is an odd integer?
(A) \(K^3 - 3 \)
(B) \(K^2 + 1 \)
(C) \((K + 1)^2 \)
(D) \(K^2 -1 \)
(E) \((K + 2)(K - 2) \)
(A) \(K^3 - 3 \)
(B) \(K^2 + 1 \)
(C) \((K + 1)^2 \)
(D) \(K^2 -1 \)
(E) \((K + 2)(K - 2) \)
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Re: If K is an odd integer, which of the following is an odd integer?
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14 Dec 2021, 06:33
14 Dec 2021, 06:33
1
Carcass wrote:
If K is an odd integer, which of the following is an odd integer?
(A) \(K^3 - 3 \)
(B) \(K^2 + 1 \)
(C) \((K + 1)^2 \)
(D) \(K^2 -1 \)
(E) \((K + 2)(K - 2) \)
(A) \(K^3 - 3 \)
(B) \(K^2 + 1 \)
(C) \((K + 1)^2 \)
(D) \(K^2 -1 \)
(E) \((K + 2)(K - 2) \)
Let's plug in a nice odd value for K.
The easiest will be K = 1.
We get....
(A) \(1^3 - 3 = -2\). No good; we want an ODD value.
(B) \(1^2 + 1 = 2\). No good; we want an ODD value.
(C) \((1 + 1)^2 = 4 \). No good; we want an ODD value.
(D) \(1^2 -1 = 0\). No good; we want an ODD value.
(E) \((1 + 2)(1 - 2) = -1\)Perfect!
Answer: E
gmatclubot
Re: If K is an odd integer, which of the following is an odd integer? [#permalink]
14 Dec 2021, 06:33
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