Arithmetic

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lolo: Junior | Next Rank: 30 Posts; Posts: 17; Joined: Sat Dec 13, 2008 9:00 am

by lolo » Fri Apr 10, 2009 7:39 am

Can someone please help on that one.

(1001²-999²)/(101²-99²) ?

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Source: Beat The GMAT — Problem Solving | Fri Apr 10, 2009 7:39 am

dmateer25: Community Manager; Posts: 1049; Joined: Sun Apr 06, 2008 5:15 pmFollowed by: 27 members; Location: Pittsburgh, PA; Thanked: 113 times; GMAT Score:710

by dmateer25 » Fri Apr 10, 2009 8:34 am

(1001²-999²)/(101²-99²)

(1001-999)(1001+999) / (101-99)(101+99)

2(2000) / 2(200)

4000/400

10

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lolo: Junior | Next Rank: 30 Posts; Posts: 17; Joined: Sat Dec 13, 2008 9:00 am

by lolo » Fri Apr 10, 2009 8:40 am

Thank's dmateer25!

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