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chetanojha: Master | Next Rank: 500 Posts; Posts: 125; Joined: Sun Sep 16, 2007 1:38 pm; Thanked: 6 times

by chetanojha » Sun May 03, 2009 1:04 am

Please help me to understand this.

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Source: Beat The GMAT — Data Sufficiency | Sun May 03, 2009 1:04 am

ketkoag: Legendary Member; Posts: 876; Joined: Thu Apr 10, 2008 8:14 am; Thanked: 13 times

by ketkoag » Sun May 03, 2009 3:01 am

from 1st: k = +2, -2, therfore |k| = 2 hence suff.
from 2nd : k = |-2| therefore |k| = 2 . hence suff.

hence D is the answer.

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