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# decimals

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Manager
Joined: 04 Sep 2006
Posts: 113

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02 Jun 2009, 12:40
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A decimal is 0.123456789101112131415161718192021...What is the 100th digit to the right of the point place of the decimal?

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Senior Manager
Joined: 16 Jan 2009
Posts: 349
Concentration: Technology, Marketing
GMAT 1: 700 Q50 V34
GPA: 3
WE: Sales (Telecommunications)

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02 Jun 2009, 13:26
Can not be determined.
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Lahoosaher

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Joined: 07 Nov 2007
Posts: 1760
Location: New York

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02 Jun 2009, 14:11
2
KUDOS
vcbabu wrote:
A decimal is 0.123456789101112131415161718192021...What is the 100th digit to the right of the point place of the decimal?

0.12345678910 11 12 13 14 15 16 17 18 19 20 21 ..

if you observe clearly.. they are sequential numbers.

first 9 numbers are single digit numbers
rest of numbers are double digit numbers and so on..

9 single numbers + 45 double digit numbers (90 digits) + first digit of (46th number) --> 100th digit

45 double digit numbers.. --> 10 to 54
46th double digit number --> 55

so 100th digit = 5
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Senior Manager
Joined: 15 Jan 2008
Posts: 268

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03 Jun 2009, 03:01
kudos..suresh..+1..

thugh i liked the expression of molsk11.. [:)]
Senior Manager
Joined: 16 Jan 2009
Posts: 349
Concentration: Technology, Marketing
GMAT 1: 700 Q50 V34
GPA: 3
WE: Sales (Telecommunications)

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04 Jun 2009, 13:51
kudos..suresh..+1

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Lahoosaher

Re: decimals   [#permalink] 04 Jun 2009, 13:51
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