Inequality DS

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hariharakarthi: Master | Next Rank: 500 Posts; Posts: 131; Joined: Tue Apr 22, 2008 1:54 pm; Thanked: 3 times; GMAT Score:550

by hariharakarthi » Sat Jul 25, 2009 9:01 am

Are positive integers y and z both are greater than x?
1. y-z>x
2. z>x

Source: Beat The GMAT — Data Sufficiency | Sat Jul 25, 2009 9:01 am

Spaceman Spiff: Senior | Next Rank: 100 Posts; Posts: 54; Joined: Fri Apr 03, 2009 7:23 pm; Location: Los Angeles; Thanked: 1 times; GMAT Score:780

by Spaceman Spiff » Sat Jul 25, 2009 10:11 am

C. #1 shows Y is greater than X but doesn't prove anything about Z. #2 only shows Z is greater than X. Together they're sufficient.

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