Gmat questions from GMAT PREP

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gana: Junior | Next Rank: 30 Posts; Posts: 27; Joined: Wed Dec 01, 2010 10:37 pm

by gana » Mon Jan 24, 2011 5:57 pm

Is w greater than 1?
1. w+2>0
2. w^2>0

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Source: Beat The GMAT — Quantitative Reasoning | Mon Jan 24, 2011 5:57 pm

Tani: Legendary Member; Posts: 1255; Joined: Fri Nov 07, 2008 2:08 pmFollowed by: 90 members; Location: St. Louis; Thanked: 312 times

by Tani » Tue Jan 25, 2011 11:28 am

The second clue is useless. It simply tells us that the variable squared is positive, but all squares (except 0) are positive. So all we know is that w isn't zero.

The first clue doesn't help either. W could be 500 or -1.

Tani Wolff

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