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

It is currently 23 May 2013, 21:54
Customize  |  Hide

Search
Register
New posts
Unanswered

Q) K is an integer. If the sum of each digit numbers of this

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Manager
Manager
User avatar
Joined: 02 Apr 2006
Posts: 94
Followers: 1

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

Q) K is an integer. If the sum of each digit numbers of this [#permalink] New post 26 Nov 2007, 05:51
Q) K is an integer. If the sum of each digit numbers of this K is 350, and K =(10^n)- 38. What is the value of n?


The OA is 40. Anybody please show me how to get this?
CEO
CEO
User avatar
Joined: 17 Nov 2007
Posts: 3596
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 231

Kudos [?]: 1300 [0], given: 346

GMAT ToolKit User GMAT Tests User
 [#permalink] New post 26 Nov 2007, 15:23
10^n=10000....000 (n is number of "0")

10^n-38=99...9962 ((n-2) is number of "9")

S=9*(n-2)+8=350=9*38+8

n-2=38

n=40
CEO
CEO
User avatar
Joined: 29 Aug 2007
Posts: 2530
Followers: 41

Kudos [?]: 358 [0], given: 19

GMAT Tests User
Re: (P/S) The sum of each digit numbers [#permalink] New post 26 Nov 2007, 15:45
pretttyune wrote:
Q) K is an integer. If the sum of each digit numbers of this K is 350, and K =(10^n)- 38. What is the value of n?


The OA is 40. Anybody please show me how to get this?


n = x+2

350 = 9x +(6+2)
x= (350 - 8)/9
x= 342/9
x =38

so n = 40
SVP
SVP
Joined: 28 Dec 2005
Posts: 1612
Followers: 1

Kudos [?]: 53 [0], given: 2

GMAT Tests User
 [#permalink] New post 26 Nov 2007, 20:11
can someone break it down a little more ?
  [#permalink] 26 Nov 2007, 20:11
    Similar topics Author Replies Last post
Similar
Topics:
 New posts K is a two-digit number, if the sum of the tens and unit laxieqv 5 05 Apr 2006, 08:53
New posts K is a two digits number, if the sum of the tens' and units' apollo168 6 17 Aug 2006, 07:35
New posts The number k is a three-digit integer that has A as its mrinal2100 3 16 Oct 2010, 13:30
Popular new posts 5 EXPERTS_POSTS_IN_THIS_TOPIC The sum of all the digits of the positive integer q is equal enigma123 10 21 Jan 2012, 16:02
Popular new posts 3 EXPERTS_POSTS_IN_THIS_TOPIC If k is the sum of the digits of integer m, and m=18n, where superpus07 10 23 Jul 2012, 10:59
Display posts from previous: Sort by

Q) K is an integer. If the sum of each digit numbers of this

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma

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