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If x > 0, what is the value of x ?

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If x > 0, what is the value of x ? [#permalink]

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New post 13 Dec 2015, 05:19
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Joined: 17 Aug 2015
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Location: India
Concentration: Strategy, General Management
GMAT 1: 750 Q49 V42
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Re: If x > 0, what is the value of x ? [#permalink]

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New post 16 Dec 2015, 10:05
Answer: (2) alone is sufficient

(1) x>5 => doesn't tell us anything about x. It could be 6, or it could be 20. NOT SUFFICIENT.
(2) 40 - x^2 = 4
So, 36=x^2
So, x = -6 or x = +6

Since we are given x>0, x = +6
SUFFICIENT
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Re: If x > 0, what is the value of x ?   [#permalink] 16 Dec 2015, 10:05
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