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What is the value of k^2 + k?

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What is the value of k^2 + k?  [#permalink]

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New post Updated on: 26 Jul 2016, 12:53
1
4
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

74% (00:27) correct 26% (00:21) wrong based on 201 sessions

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What is the value of k^2 + k?

(1) The value of k + 1 is 1.
(2) The value of k^2 is 0.

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Originally posted by zxcvbnmas on 25 Jul 2016, 20:10.
Last edited by zxcvbnmas on 26 Jul 2016, 12:53, edited 1 time in total.
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Re: What is the value of k^2 + k?  [#permalink]

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New post 26 Jul 2016, 10:29
k^2+k= k(k+1)
Statement 1:
k+1=1
not sufficient

Statement 2:
k^2=0
=> k=0

k(K+1) =0
sufficient
answer B
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Re: What is the value of k^2 + k?  [#permalink]

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New post 26 Jul 2016, 10:41
zxcvbnmas wrote:
What is the value of k^2 + k?

This seems far too easy for GMAT.
We need to find the value of \(k\).

(1) The value of \(k + 1\) is \(1\).
\(k = 0\)
Sufficient

(2) The value of \(k^2\) is \(0\).
\(k = \pm 0 = 0\)
Sufficient

(D) each statement alone is sufficient

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Re: What is the value of k^2 + k?  [#permalink]

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New post 07 Aug 2016, 07:07
zxcvbnmas wrote:
What is the value of \(k^2\) + k?

(1) The value of k + 1 is 1.
(2) The value of \(k^2\) is 0.


The question asks what is the value of k(k+1)

Statement 1. k+1=1 hence k=0 and k(k+1)=0 sufficient
Statement 2. k^2 = 0 hence k=0 and k(k+1)=0 sufficient

Answer D
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Re: What is the value of k^2 + k?  [#permalink]

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New post 11 Feb 2018, 16:35
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: What is the value of k^2 + k? &nbs [#permalink] 11 Feb 2018, 16:35
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