Question 1 (nov.24th)

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bacali: Master | Next Rank: 500 Posts; Posts: 245; Joined: Thu Aug 16, 2007 12:41 pm

by bacali » Mon Nov 24, 2008 11:37 am

Q36:

What is the sum of a certain pair of consecutive odd integers?
(1) At least one of the integers is negative.
(2) At least one of the integers is positive.

OA: C

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Source: Beat The GMAT — Data Sufficiency | Mon Nov 24, 2008 11:37 am

Tryingmybest: Master | Next Rank: 500 Posts; Posts: 168; Joined: Thu Nov 13, 2008 4:34 am; Location: Pittsburgh; Thanked: 9 times

by Tryingmybest » Mon Nov 24, 2008 12:16 pm

Odd integers are ...-5,-3,-2 ,-1,1,3,5,7.... etc

If we consider the conditions individually we cannot arrive at a unique pair of odd integers.

We need both conditions to arrive at the sum ie -1 + 1 = 0
So C

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