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magical cook: Master | Next Rank: 500 Posts; Posts: 484; Joined: Sun Jul 30, 2006 7:01 pm; Thanked: 2 times; Followed by:1 members

by magical cook » Sat Aug 25, 2007 1:40 pm

Hi,

Can anyone help?

Thanks!

Attachments

Source: Beat The GMAT — Data Sufficiency | Sat Aug 25, 2007 1:40 pm

beny: Master | Next Rank: 500 Posts; Posts: 214; Joined: Fri Jul 20, 2007 1:35 am; Thanked: 3 times

by beny » Sat Aug 25, 2007 1:46 pm

Answer E.

No matter what, x could equal 1 or -1, thus x+y could equal 1 or -1.

magical cook: Master | Next Rank: 500 Posts; Posts: 484; Joined: Sun Jul 30, 2006 7:01 pm; Thanked: 2 times; Followed by:1 members