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What is: 14387100 / (14387100^2 - (14387105 * 14387095))?

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GMAT Instructor
Joined: 07 Jul 2003
Posts: 770
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Schools: Haas, MFE; Anderson, MBA; USC, MSEE
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What is: 14387100 / (14387100^2 - (14387105 * 14387095))? [#permalink]  16 Jan 2004, 01:08
What is:

14387100 / (14387100^2 - (14387105 * 14387095))?

(remember you have only 2 minutes...)

A) 143871
B) 287742
C) 575484
D) 1438710
E) 2877420

[/code]
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AkamaiBrah
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993

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[#permalink]  16 Jan 2004, 01:23
14387100 / (14387100^2 - (14387105 * 14387095))

14387100 / (14387100^2 - (14387100+5)(143870100-5))

14387100 / (14387100^2 - (14387100^2 - 25))?

14387100 / 25

first number is 5 so C.

Took me a little longer than 2mins
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[#permalink]  16 Jan 2004, 01:36
Nice Calnhob
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Paul

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[#permalink]  16 Jan 2004, 04:30
Got C but took 10 secs. here it is let 14387100 be a then 14387105 will be (a+5) and 14381095 will be (a-5) so by substituting we will get a/a^2 -{ (a+5)*(a-5)} = a/25 = 14387100/25 = answer C
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Joined: 26 Dec 2003
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[#permalink]  16 Jan 2004, 04:39
Sorry guys about 20 secs
[#permalink] 16 Jan 2004, 04:39
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What is: 14387100 / (14387100^2 - (14387105 * 14387095))?

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