gmat prep num props

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vinviper1: Master | Next Rank: 500 Posts; Posts: 222; Joined: Tue Mar 25, 2008 3:52 pm; Thanked: 2 times

by vinviper1 » Tue May 13, 2008 11:48 am

Thanks

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Source: Beat The GMAT — Data Sufficiency | Tue May 13, 2008 11:48 am

akshatsingh: Senior | Next Rank: 100 Posts; Posts: 77; Joined: Thu Apr 10, 2008 10:13 pm; Thanked: 4 times

by akshatsingh » Tue May 13, 2008 9:46 pm

1) Insufficient. Put w = -1 and 1.
2) w^2>1 means w can assume a negative and a positive value as well. Insufficient

1) and 2) together also aree unable to tell the sign of w

Answer seems E to me.

Aks

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