Gmat prep question

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mttorii: Junior | Next Rank: 30 Posts; Posts: 23; Joined: Wed Jun 06, 2007 9:35 am

by mttorii » Thu Jul 05, 2007 5:41 pm

Hi all. Can someone help me to solve this question. The right answer is C.

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Source: Beat The GMAT — Problem Solving | Thu Jul 05, 2007 5:41 pm

givemeanid: Master | Next Rank: 500 Posts; Posts: 277; Joined: Sun Jun 17, 2007 2:51 pmFollowed by: 1 member; Location: New York, NY; Thanked: 6 times

by givemeanid » Thu Jul 05, 2007 6:12 pm

You need to find number of pairs of consecutive terms whose product is negative.

1 * -3 = -3
-3 * 2 = -6
2 * 5 = 10
5 * -4 = -20
-4 * -6 = 24

The number of -ve products is 3. Answer is C.

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