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What is the sum of all digits for the number 10^30 - 37

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What is the sum of all digits for the number 10^30 - 37 [#permalink]

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65% (02:09) correct 35% (01:25) wrong based on 125 sessions

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What is the sum of all digits for the number 10^30 - 37 ?

A. 63
B. 252
C. 261
D. 270
E. 337

Edit: Sorry, I meant to have this in the PS sub-forum.
[Reveal] Spoiler: OA

Last edited by Bunuel on 11 Feb 2013, 10:05, edited 1 time in total.
Moved to PS forum.
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Re: What is the sum of all digits for the number 10^30 - 37 [#permalink]

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exploringm wrote:
What is the sum of all digits for the number 10^30 - 37 ?

A. 63
B. 252
C. 261
D. 270
E. 337

Edit: Sorry, I meant to have this in the PS sub-forum.


10^30 is a 31-digit number: 1 followed by 30 zeros.

10^30 - 37 is a 30-digit number: 28 9's and 63 in the end. Thus the sum of the digits is 28*9+6+3=261.

Answer: C.

Similar question to practice:
10-25-560-is-divisible-by-all-of-the-following-except-126300.html

Hope it helps.
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Re: What is the sum of all digits for the number 10^30 - 37 [#permalink]

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Re: What is the sum of all digits for the number 10^30 - 37 [#permalink]

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New post 14 Feb 2016, 00:15
Hello from the GMAT Club BumpBot!

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Re: What is the sum of all digits for the number 10^30 - 37   [#permalink] 14 Feb 2016, 00:15
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What is the sum of all digits for the number 10^30 - 37

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