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# If m=1+1/4+1/16+1/64, n=1+(1/4)m, m-n=? A 1/256 B 1/128

Author Message
Senior Manager
Joined: 01 Jan 2007
Posts: 299
If m=1+1/4+1/16+1/64, n=1+(1/4)m, m-n=? A 1/256 B 1/128   [#permalink]

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22 May 2007, 11:10
1
00:00

Difficulty:

(N/A)

Question Stats:

100% (01:19) correct 0% (00:00) wrong based on 26 sessions

### HideShow timer Statistics

If m=1+1/4+1/16+1/64, n=1+(1/4)m, m-n=?

A 1/256
B 1/128
C 0
D -1/128
E -1/256.

OA E

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Manager
Joined: 18 Apr 2007
Posts: 119

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22 May 2007, 12:00

m=1+1/4+1/16+1/64
m=64/64+16/64+4/64+1/64
m=85/64

n=1+(m/4)
n=1+((85/64)/4)
n=1+85/256
n=(256/256)+(85/256)
n=341/256

m-n=
(85/64)-(341/256)=

Multiply 85/64 by 4 to get a common denominator:

(340/256)-(341/256) = -1/256

Senior Manager
Joined: 01 Jan 2007
Posts: 299

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23 May 2007, 07:27
Good job guys, OA is E

Javed.

Cheers!

--== Message from the GMAT Club Team ==--

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This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

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Non-Human User
Joined: 09 Sep 2013
Posts: 9464
Re: If m=1+1/4+1/16+1/64, n=1+(1/4)m, m-n=? A 1/256 B 1/128   [#permalink]

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04 Aug 2018, 21:19
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: If m=1+1/4+1/16+1/64, n=1+(1/4)m, m-n=? A 1/256 B 1/128 &nbs [#permalink] 04 Aug 2018, 21:19
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