Number in a list.

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atulkumar79: Junior | Next Rank: 30 Posts; Posts: 15; Joined: Tue Mar 17, 2009 3:43 pm; Thanked: 1 times

by atulkumar79 » Thu Jun 25, 2009 10:33 am

There are more than 2 numbers in a certain list, is each of the numbers in the list equal to 0?

(1) The product of any 2 numbers in the list is equal to 0.

(2) The sum of any 2 numbers in the list is equal to 0.

This question came up in the official gmat prep test. I chose A but the prep software says B.

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Source: Beat The GMAT — Data Sufficiency | Thu Jun 25, 2009 10:33 am

abhinav85: Master | Next Rank: 500 Posts; Posts: 179; Joined: Mon Dec 29, 2008 4:41 am; Thanked: 2 times

by abhinav85 » Thu Jun 25, 2009 10:37 am

IMO B.

statement 1 saying that sum product of any 2 numbers in the list is equal to 0 this could not be true in every case for ex..0,0,0,2.

Statement 2 saying that sum of any two numbers is equal to 0,that means
whenever we add any number the total is 0.Sufficeint.

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atulkumar79: Junior | Next Rank: 30 Posts; Posts: 15; Joined: Tue Mar 17, 2009 3:43 pm; Thanked: 1 times

by atulkumar79 » Thu Jun 25, 2009 10:44 am

abhinav85 wrote:IMO B.

statement 1 saying that sum product of any 2 numbers in the list is equal to 0 this could not be true in every case for ex..0,0,0,2.

Statement 2 saying that sum of any two numbers is equal to 0,that means
whenever we add any number the total is 0.Sufficeint.

Thanks dude, I missed the point in solving it too fast

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