On a number line is x > y, is z between x and y? : GMAT Data Sufficiency (DS)
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# On a number line is x > y, is z between x and y?

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Intern
Joined: 05 Nov 2010
Posts: 32
Followers: 1

Kudos [?]: 22 [0], given: 0

On a number line is x > y, is z between x and y? [#permalink]

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07 Nov 2010, 12:36
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Difficulty:

55% (hard)

Question Stats:

43% (02:44) correct 57% (01:37) wrong based on 7 sessions

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On a number line is x > y, is z between x and y?

(1) x < 0
(2) y - x > z
[Reveal] Spoiler: OA
Retired Moderator
Joined: 02 Sep 2010
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Location: London
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Kudos [?]: 936 [1] , given: 25

Re: On a number line is x > y, is z between x and y? [#permalink]

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07 Nov 2010, 15:47
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KUDOS
Creeper300 wrote:
On a number line is x>y, is z between x and y?

1. x<0
2. y-x>z

(1) Says nothing about z : Insufficient

(2) y-x > z ... since y<x, all this says is taht z<0, we dont know if its between x & y : Insufficient

(1+2) x<0 .... y<x so y<0 .... and y-x>z which means z<0.
Say x=-3 & y=-6 ... If z=-5 then y-x>z and x<0 ... If z=-8 then y-x>z and x>0
Insufficient still

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Re: On a number line is x > y, is z between x and y?   [#permalink] 07 Nov 2010, 15:47
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# On a number line is x > y, is z between x and y?

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