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GMAT Prep Quant Questions - Please Help

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Intern
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GMAT Prep Quant Questions - Please Help [#permalink] New post 28 Oct 2006, 10:06
Hi,

I took the 1st GMAT Prep Practise Test a couple of days ago.

Came across a few questions for which I felt I could use a more elaborate explanation. So would be very grateful to anyone who could provide the same.

Thanks.

Zippo

P.S.: Have attached the questions in a word file. Sorry but I could n't post them
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Senior Manager
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 [#permalink] New post 28 Oct 2006, 10:55
Sum = ½ - ¼ + 1/8 + -1/16 + 1/32 -1/64 .....
= ¼ +1/8 -1/16 +1/32 -1/64 ....

1/8 > 1/16, Similarly 1/32 >1/64, terms that are added is greater than the subtracted terms
1/8 is added to ¼ and 1/16 is subtracted ...so the result is > ¼

... but the sum will never exceed ½

Answer is between ½ and 1/4
  [#permalink] 28 Oct 2006, 10:55
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GMAT Prep Quant Questions - Please Help

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