Sums of rows and columns

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Sums of rows and columns

by Brent@GMATPrepNow » Thu Jan 22, 2009 8:47 am
Please note that this is not an official GMAT question; it�s my attempt to create difficult (650+ level) GMAT-style questions for this forum.
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Last edited by Brent@GMATPrepNow on Tue Jan 31, 2012 8:09 am, edited 1 time in total.
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by sacx » Thu Jan 22, 2009 9:07 am
from 1st row

A + A + B + C = 11

from 3rd row

A + B + C + B = 5

1st row - 2nd row

A-B = 6
SACX

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by Brent@GMATPrepNow » Thu Jan 22, 2009 9:15 am
sacx wrote:from 1st row

A + A + B + C = 11

from 3rd row

A + B + C + B = 5

1st row - 2nd row

A-B = 6
Nice work! The answer is E
Row 1: 2A+B+C=11
Row 3: A+2B+C=5
(Row 1) - (Row 3): A-B=6
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