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# If -10 < k < 10, is K > 0 ?" (1) k2 > 4 (2) 1 -

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If -10 < k < 10, is K > 0 ?" (1) k2 > 4 (2) 1 - [#permalink]  06 Dec 2003, 21:01
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If -10 < k < 10, is K > 0 ?"

(1) k2 > 4

(2) 1 - k > 0
Statement 1 alone is sufficient but Statement 2 alone is NOT.
Statement 2 alone is sufficient but Statement 1 alone is NOT.
Statements 1 and 2 TOGETHER are sufficient but neither alone is.
EACH statement alone is sufficient,
NEITHER statement alone or combined is sufficient.
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[#permalink]  06 Dec 2003, 21:06
A tells us that K is positive or negative 2. Insufficient.
B tells us that K is less than 1. Insufficient.
The two ststements together tell us that K is negative 2. Sufficient.

C.
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[#permalink]  06 Dec 2003, 21:31
agree with C
from 2, we know k<1, hence, from 1, K=-2
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[#permalink]  16 Jan 2004, 00:13
Sorry to bring up old ones but I'm getting conflicting answers.

If -10 < k < 10, is K > 0 ?

(1) k2 > 4

(2) 1 - k > 0

1: k > 2 so A is suff
2: k < 1 so B is insuff

A?

is k2 > 4 suppose to be k^2 = 4?
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[#permalink]  16 Jan 2004, 01:03
Yes, but you forgot to account for (-2)^2 which also = 4. So A is not sufficient
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[#permalink]  16 Jan 2004, 01:08
The original statement 1 says k2 > 4...is this wrong? is it suppose to say k^2=4?

<a href="#17874">Statement 1: k2 > 4</a>
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[#permalink]  16 Jan 2004, 01:29
Yes, I believe k2 should have been k^2. Otherwise, he would have written 2 in front of k, or 2k
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Paul

[#permalink] 16 Jan 2004, 01:29
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# If -10 < k < 10, is K > 0 ?" (1) k2 > 4 (2) 1 -

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