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# Sum of series: 1+11+111+1111...n terms is equal to

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Intern
Joined: 01 Aug 2003
Posts: 48

Kudos [?]: 1 [0], given: 0

Location: Mumbai
Sum of series: 1+11+111+1111...n terms is equal to [#permalink]

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11 Aug 2003, 21:57
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Sum of series:
1+11+111+1111...n terms
is equal to?

Kudos [?]: 1 [0], given: 0

GMAT Instructor
Joined: 07 Jul 2003
Posts: 769

Kudos [?]: 235 [0], given: 0

Location: New York NY 10024
Schools: Haas, MFE; Anderson, MBA; USC, MSEE

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11 Aug 2003, 22:35
mistdew wrote:
Sum of series:
1+11+111+1111...n terms
is equal to?

I don't think this is a fair GMAT question, but I believe the answer is:

(10(10^n - 1)/9 - n)/9
_________________

Best,

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

Kudos [?]: 235 [0], given: 0

Re: Sum of series   [#permalink] 11 Aug 2003, 22:35
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