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Is x< 0? a. x+2 > 0 b. 2x > 3x Is this a 700 level

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Is x< 0? a. x+2 > 0 b. 2x > 3x Is this a 700 level [#permalink] New post 23 Oct 2010, 07:24
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Is x< 0?

a. x+2 > 0
b. 2x > 3x

Is this a 700 level question?
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Re: Need help with this one. [#permalink] New post 23 Oct 2010, 10:55
The correct answer is B.
(1) 3+2 >0 , -1/3+2>0 - hence insufficient.
(2) 2*(-1/4)>3*(-1/4), 2*-2>3*-3 - hence sufficient.

This is a 600-650 question.
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Re: Need help with this one. [#permalink] New post 23 Oct 2010, 20:29
Expert's post
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Re: Need help with this one. [#permalink] New post 24 Oct 2010, 16:03
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smitakokne wrote:
Is x< 0?

a. x+2 > 0
b. 2x > 3x

Is this a 700 level question?


(1) x+2>0 ...x>-2 ... Insufficient
(2) 2x>3x ... 3x-2x<0 ... x<0 .... Sufficient

Answer is (b)

In my opinion, this is not a 700 level question
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Need help with this one. [#permalink] New post 17 Jun 2011, 11:19
Answer is b.

A is insuff. -1 can still be > 0

B is suff bc without a neg there is no way it can be true. Plug in a neg or pos to check answer

For more info review number properties
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Need help with this one. [#permalink] New post 17 Jun 2011, 11:19
Answer is b.

A is insuff. -1 can still be > 0

B is suff bc without a neg there is no way it can be true. Plug in a neg or pos to check answer

For more info review number properties
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Need help with this one. [#permalink] New post 17 Jun 2011, 11:20
Answer is b.

A is insuff. -1 can still be > 0

B is suff bc without a neg there is no way it can be true. Plug in a neg or pos to check answer

For more info review number properties
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Need help with this one. [#permalink] New post 17 Jun 2011, 11:20
Answer is b.

A is insuff. -1 can still be > 0

B is suff bc without a neg there is no way it can be true. Plug in a neg or pos to check answer

For more info review number properties
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Need help with this one. [#permalink] New post 17 Jun 2011, 11:20
Answer is b.

A is insuff. Plug in neg 1 and any other pos int

B is suff bc without a neg there is no way it can be true. Plug in a neg or pos to check answer
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Need help with this one. [#permalink] New post 17 Jun 2011, 11:22
B; for A plug in -1. Good review for this is mgmat number properties
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Re: Need help with this one. [#permalink] New post 17 Jun 2011, 17:48
is x<0?

1. Not sufficient

x+2 >0

x>-2

x = -1 yes
x= 16 no

2. Sufficient

2x>3x => 2x-3x>0 => -x>0 => x<0

Answer is B.
Re: Need help with this one.   [#permalink] 17 Jun 2011, 17:48
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