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gluon
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What is the value of the integer k? (1) k + 3 > 0 (2) k^4 Updated on: 01 Sep 2007, 21:58
Originally posted by gluon on 01 Sep 2007, 20:26.
Last edited by gluon on 01 Sep 2007, 21:58, edited 1 time in total.
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What is the value of the integer k?
(1) k + 3 > 0
(2) k^4 ≤ 0



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What is the value of the integer k? (1) k + 3 > 0 (2) k^4 01 Sep 2007, 21:20
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A is not suff.
B is not suff.
Combine the two, still not suff (k=-1,-2) satisfy the two inequality.
Hence, E
gluon
What is the value of the integer k?
(1) k + 3 > 0
(2) k4 ≤ 0
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What is the value of the integer k? (1) k + 3 > 0 (2) k^4 01 Sep 2007, 21:26
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My Take is E.

1. Is not sufficient as there is more than one solution satisfying the eqn.
2. Is not suffient alone as there is more than one solution
3. Together not sufficient as (-2,-1 and 0) are possible.

OA ?
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Whatever
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What is the value of the integer k? (1) k + 3 > 0 (2) k^4 01 Sep 2007, 21:57
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I: Ins: K > -3
II: Ins: K <=0
Together: Ins: we have range -3 < r <=0

Ans. E
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gluon
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What is the value of the integer k? (1) k + 3 > 0 (2) k^4 01 Sep 2007, 22:00
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Guys my sincerest apologies. There was a copy and paste error in the post.

It should be:

(2) k^4 ≤ 0

Please reconsider your solutions.
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Amit05
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What is the value of the integer k? (1) k + 3 > 0 (2) k^4 01 Sep 2007, 23:22
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Whatever
gluon
Guys my sincerest apologies. There was a copy and paste error in the post.

It should be:

(2) k^4 ≤ 0

Please reconsider your solutions.

K = 0, hence answ. is B
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I second that with "whatever" ..
k^4 cannot be negative as the even power is awlays +ve or 0.. Hence k^4 has to be 0. Hence k = 0.
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What is the value of the integer k? (1) k + 3 > 0 (2) k^4 02 Sep 2007, 05:49
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Thanks guys, yes the OA is B.

That k^4 ≤ 0 was driving me nuts. How the heck can k^4 < 0?
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What is the value of the integer k? (1) k + 3 > 0 (2) k^4 16 Sep 2007, 12:32
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gluon
Thanks guys, yes the OA is B.

That k^4 ≤ 0 was driving me nuts. How the heck can k^4 < 0?
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:-) Yes.... k^4 can not be less than zero.

- Brajesh
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What is the value of the integer k? (1) k + 3 > 0 (2) k^4 16 Sep 2007, 13:41
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gluon
What is the value of the integer k?
(1) k + 3 > 0
(2) k^4 ≤ 0
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1) not sufficient since k can be any value
2) only integer that make this stmt true is 0
i get B since any raising anything to an even power will generate a positive value (i.e. fraction or int)
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What is the value of the integer k? (1) k + 3 > 0 (2) k^4 16 Sep 2007, 23:00
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St1:
k > -3. Insufficient. Can be any value above -3.

St2:
k^4 <0> 0. Sufficient.

Ans B
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GMATBLACKBELT
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What is the value of the integer k? (1) k + 3 > 0 (2) k^4 16 Sep 2007, 23:21
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actually got it from ur first post.

S1: k could be anything above -3. So negative, positive, fraction, etc... no help here.


S2: k^4 will ALWAYS be positive unless it is 0, in which case it is just 0.

any negative to an even power is always positive. so k^4<=0... it has to be zero. k can't be any negative or positive value.


Ans B.



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