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Is x > 0?

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Senior Manager
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Concentration: Finance, Economics
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Is x > 0? [#permalink] New post 17 Aug 2013, 08:10
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73% (02:09) correct 27% (01:17) wrong based on 51 sessions
Is x > 0?

(1) |x + 3| < 4

(2) |x – 3| < 4
[Reveal] Spoiler: OA

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Re: Is x > 0? [#permalink] New post 17 Aug 2013, 10:30
Stiv wrote:
Is x > 0?

(1) |x + 3| < 4

(2) |x – 3| < 4


(1) |x + 3| < 4
Case 1:
x+3 < 4
x<1

Case 1:
-x-3 < 4
-x < 7
x > -7

x may be greater or less than zero. Hence insufficient.


(2) |x – 3| < 4
Case 1:
x-3 < 4
x < 7

Case 2:
-x+3 < 4
-x < 1
x > -1

x may be greater or less than zero. Hence insufficient.

(1) and (2) together. may be less or more than zero. Hence insufficient.[/b]



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Re: Is x > 0?   [#permalink] 17 Aug 2013, 10:30
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