Sums of rows and columns

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pm; Location: Vancouver, BC; Thanked: 5254 times; Followed by:1268 members; GMAT Score:770

by Brent@GMATPrepNow » Thu Jan 22, 2009 8:47 am

Please note that this is not an official GMAT question; itï¿½s my attempt to create difficult (650+ level) GMAT-style questions for this forum.

Last edited by Brent@GMATPrepNow on Tue Jan 31, 2012 8:09 am, edited 1 time in total.

Brent Hanneson - Creator of GMATPrepNow.com

Source: Beat The GMAT — Problem Solving | Thu Jan 22, 2009 8:47 am

sacx: Master | Next Rank: 500 Posts; Posts: 139; Joined: Wed Oct 22, 2008 4:36 am; Thanked: 17 times

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

Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pm; Location: Vancouver, BC; Thanked: 5254 times; Followed by:1268 members; GMAT Score:770

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

Brent Hanneson - Creator of GMATPrepNow.com

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