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How many digits are required to number a book containing...

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New post 01 Oct 2012, 07:08
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A
B
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  45% (medium)

Question Stats:

62% (01:44) correct 38% (01:39) wrong based on 212 sessions

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How many digits are required to number a book containing 200 pages ?

A) 200
B) 600
C) 492
D) 372
E) 250

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New post 01 Oct 2012, 07:16
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New post 06 Nov 2012, 07:49
Bunuel can you give a more detailed explanation, because I think the question is a little ambiguitios
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New post 06 Nov 2012, 07:54
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New post 06 Nov 2012, 07:59
The first part containing the unit digits is easy to understand, however the parts containing the tens digits and hundreds digits needs some extra clarification.
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New post 06 Nov 2012, 08:06
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KevinBrink wrote:
The first part containing the unit digits is easy to understand, however the parts containing the tens digits and hundreds digits needs some extra clarification.


Each page from 1 to 9, inclusive (so total of 9 pages) needs one digit;
Each page from 10 to 99, inclusive (so total of 90 pages) needs two digits (for example page 12 needs two digits: 1 and 2);
Each page from 100 to 200, inclusive (so total of 101 pages) needs three digits (for example page 123 needs three digits: 1, 2 and 3).

Hope it's clear.
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New post 06 Nov 2012, 08:09
Thanks, the content question is not hard however it did not understand it because of the odd strange pronunciation! Thanks for the clarification!
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New post 06 Nov 2012, 08:18
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Quote:
Thanks, the content question is not hard however it did not understand it because of the odd strange pronunciation! Thanks for the clarification!


After attempting hundreds of official GMAT questions (OG11.12 and 13) i can safely say that the language used by the GMAT will be less ambiguous and clearer..
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New post 20 Jan 2018, 19:02
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Unit digits : All 200 numbers contain unit digits
Tens digits: 90 ( i.e from 10 to 99 ) + 101 ( i.e from 100 to 200 )
Hundreds digits: 101 ( i.e again from 100 to 200 )
Total number of digits: 200 + 90 + 101 + 101 = 492

Just restarted my GMAT life. KUDOs please :-)
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New post 07 Jul 2019, 07:56
Unit digits : All 200 numbers contain unit digits
Tens digits: 90 ( i.e from 10 to 99 ) + 101 ( i.e from 100 to 200 )
Hundreds digits: 101 ( i.e again from 100 to 200 )
Total number of digits: 200 + 90 + 101 + 101 = 492

Hence the answer is C.
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Re: How many digits are required to number a book containing...   [#permalink] 07 Jul 2019, 07:56
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