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Is |k| = 2?

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Is |k| = 2? [#permalink] New post 28 Apr 2010, 11:30
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

72% (01:26) correct 27% (00:26) wrong based on 90 sessions
Is |k| = 2?

(1) k^2 = 4
(2) k = |-2|
[Reveal] Spoiler: OA
Manager
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Re: Is |k| = 2? need help [#permalink] New post 28 Apr 2010, 11:33
1. K sqr = 4 => k= +2 or -2 = |k| ??? Suff ?
2. k= |-2| = > |k| = 2 ?? Suff ?


is the answer D correct?. I will verify the answer after i see one of your reply.

Last edited by zz0vlb on 03 May 2010, 18:10, edited 1 time in total.
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Re: Is |k| = 2? need help [#permalink] New post 28 Apr 2010, 11:38
zz0vlb wrote:
Is |k| = 2?

(1) k sqr = 4
(2) k = |-2|

I need someone to explain me the concept of this problem. I am not fully confident. Gurpreet or Bunuel?


I'm not gurpreet or Bunuel, but still would like to try..!! :-D :-D

Question asks Is |k| = 2 >>> which means >>> Is k= 2,-2.
If the value of k is 2 or -2, the answer will "YES"

Statement 1:
k sqr = 4 means >>> k =2 or k=-2, In either case |k| = 2.

Statement 2:
k = |-2| = 2.
so k =2, so |k| = 2.

IMO its D.
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Re: Is |k| = 2? need help [#permalink] New post 29 Apr 2010, 07:44
nverma wrote:
zz0vlb wrote:
Is |k| = 2?

(1) k sqr = 4
(2) k = |-2|

I need someone to explain me the concept of this problem. I am not fully confident. Gurpreet or Bunuel?


I'm not gurpreet or Bunuel, but still would like to try..!! :-D :-D

Question asks Is |k| = 2 >>> which means >>> Is k= 2,-2.
If the value of k is 2 or -2, the answer will "YES"

Statement 1:
k sqr = 4 means >>> k =2 or k=-2, In either case |k| = 2.

Statement 2:
k = |-2| = 2.
so k =2, so |k| = 2.

IMO its D.



Statement 1:
k sqr = 4 means >>> k =2 or k=-2, Also k can be Root 4

NOT SUFF

Statement 2:
k = |-2| = 2.
so k =2, so |k| = 2.

SUFF

IMO B
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Re: Is |k| = 2? need help [#permalink] New post 30 Apr 2010, 08:01
chauhan2011 wrote:
nverma wrote:
zz0vlb wrote:
Is |k| = 2?

(1) k sqr = 4
(2) k = |-2|

I need someone to explain me the concept of this problem. I am not fully confident. Gurpreet or Bunuel?


I'm not gurpreet or Bunuel, but still would like to try..!! :-D :-D

Question asks Is |k| = 2 >>> which means >>> Is k= 2,-2.
If the value of k is 2 or -2, the answer will "YES"

Statement 1:
k sqr = 4 means >>> k =2 or k=-2, In either case |k| = 2.

Statement 2:
k = |-2| = 2.
so k =2, so |k| = 2.

IMO its D.



Statement 1:
k sqr = 4 means >>> k =2 or k=-2, Also k can be Root 4

NOT SUFF

Statement 2:
k = |-2| = 2.
so k =2, so |k| = 2.

SUFF

IMO B

D for sure. The question is about |k|, root 4 =2. k=2 or -2 <=> k square=4 <=> |k|=2

ksquare=4 doesn't mean k can be root 4
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Re: Is |k| = 2? need help [#permalink] New post 03 May 2010, 18:30
+1 D

please post OA?
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Re: Is |k| = 2? (1) k sqr = 4 (2) k = |-2| I need someone to [#permalink] New post 16 Oct 2013, 04:26
zz0vlb wrote:
Is |k| = 2?

(1) k sqr = 4
(2) k = |-2|

I need someone to explain me the concept of this problem. I am not fully confident. Gurpreet or Bunuel?


Hey Guys - Going with D on this one.
Anyone, have the OA please?

Thanks
Cheers!
J:)
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Re: Is |k| = 2? (1) k sqr = 4 (2) k = |-2| I need someone to [#permalink] New post 16 Oct 2013, 05:52
Expert's post
jlgdr wrote:
zz0vlb wrote:
Is |k| = 2?

(1) k sqr = 4
(2) k = |-2|

I need someone to explain me the concept of this problem. I am not fully confident. Gurpreet or Bunuel?


Hey Guys - Going with D on this one.
Anyone, have the OA please?

Thanks
Cheers!
J:)


Is |k| = 2?

(1) k^2 = 4 --> |k| = 2. Sufficient.

(2) k = |-2| --> k=2 --> |k| = 2. Sufficient.

Answer: D.
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Re: Is |k| = 2? (1) k sqr = 4 (2) k = |-2| I need someone to   [#permalink] 16 Oct 2013, 05:52
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