xyz on a number line

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crackgmat007: Legendary Member; Posts: 882; Joined: Fri Feb 20, 2009 2:57 pm; Thanked: 15 times; Followed by:1 members; GMAT Score:690

xyz on a number line

by crackgmat007 » Mon May 25, 2009 5:49 pm

Pls explain

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Last edited by crackgmat007 on Wed May 27, 2009 8:22 pm, edited 1 time in total.

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Source: Beat The GMAT — Data Sufficiency | Mon May 25, 2009 5:49 pm

shah395: Newbie | Next Rank: 10 Posts; Posts: 7; Joined: Sun Oct 05, 2008 7:45 pm; Thanked: 1 times

[quote="crackgmat007"]Pls explain[/quote]

Think about it, only two options on the number line - either Z is in between X and Y or Z is outside the range...

Pick two possibilites.. that suffice the "given" legnth of XY > Legnth of XZ

Y = -2
X = 1
Z = 2

OR

Y = -2
Z = 1
X =2

For both = XYZ < 0 and XY < 0

As such, IMO "E"

Let me know if I am not thinking this right...