z>1

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colakumarfanta: Senior | Next Rank: 100 Posts; Posts: 49; Joined: Mon May 03, 2010 2:55 am; Thanked: 1 times

by colakumarfanta » Thu May 20, 2010 11:17 pm

Is z> 1?
1) xyz = 1
2) xy (z ^ 2)> 1

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Source: Beat The GMAT — Data Sufficiency | Thu May 20, 2010 11:17 pm

liferocks: Legendary Member; Posts: 576; Joined: Sat Mar 13, 2010 8:31 pmFollowed by: 1 member; Thanked: 97 times

by liferocks » Thu May 20, 2010 11:24 pm

From either of the statements alone cannot conclude anything.

together

xy (z ^ 2)> 1 and xyz=1..so xyz*z>1 or 1*z>1..sufficient

Ans option C

"If you don't know where you are going, any road will get you there."
Lewis Carroll

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