Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 21 May 2013, 18:58
Customize  |  Hide

Search
Register
New posts
Unanswered

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

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Intern
Intern
Joined: 25 Dec 2012
Posts: 30
Followers: 0

Kudos [?]: 0 [0], given: 10

What is the sum of all digits for the number 10^30 - 37 [#permalink] New post 11 Feb 2013, 10:01
00:00

Question Stats:

53% (02:26) correct 46% (01:16) wrong based on 1 sessions
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.
GMAT Club team member
User avatar
Joined: 02 Sep 2009
Posts: 11534
Followers: 1795

Kudos [?]: 9560 [0], given: 826

GMAT Tests User CAT Tests
Top Member of the Month
Re: What is the sum of all digits for the number 10^30 - 37 [#permalink] New post 11 Feb 2013, 10:15
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.
_________________

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. NEW!!!

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set. NEW!!!


What are GMAT Club Tests?
25 extra-hard Quant Tests

Find out what's new at GMAT Club - latest features and updates

Re: What is the sum of all digits for the number 10^30 - 37   [#permalink] 11 Feb 2013, 10:15
    Similar topics Author Replies Last post
Similar
Topics:
 New posts What is the sum of all three digit numbers between 200 and sunniboy007 4 29 Feb 2004, 17:22
New posts What is the sum of all digits for the number (10^50) -74 joemama142000 3 08 Jan 2006, 00:13
New posts What is the SUM of all possible 3 digit numbers that can be bmwhype2 2 17 Oct 2007, 21:59
New posts 3 EXPERTS_POSTS_IN_THIS_TOPIC What is the sum of all 4-digit numbers that can be formed dimitri92 6 26 May 2010, 00:38
New posts 7 EXPERTS_POSTS_IN_THIS_TOPIC What is the sum of all possible 3-digit numbers that can be sugu86 8 26 Apr 2012, 00:59
Display posts from previous: Sort by

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

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma, IanStewart

Search for:


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com