gmat prep num props

This topic has expert replies
Master | Next Rank: 500 Posts
Posts: 222
Joined: Tue Mar 25, 2008 3:52 pm
Thanked: 2 times

gmat prep num props

by vinviper1 » Tue May 13, 2008 11:48 am
Thanks
Attachments
Q28 DS num prop.JPG

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