It is currently 17 Mar 2018, 15:25

### GMAT Club Daily Prep

#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# The function f is defined for each positive three-digit

Author Message
Manager
Joined: 03 Oct 2008
Posts: 61
The function f is defined for each positive three-digit [#permalink]

### Show Tags

08 Oct 2008, 14:17
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

The function f is defined for each positive three-digit integer n by f(n) = 2^x 3^y 5^z, where x, y and z are the hundreds, tens, and units digits of n, respectively. If m and v are three-digit positive integers such that f(m) = 9 f(v), then m - v =

A. 8
B. 9
C. 18
D. 20
E. 80
Director
Joined: 23 May 2008
Posts: 762

### Show Tags

08 Oct 2008, 15:42
albany09 wrote:
The function f is defined for each positive three-digit integer n by f(n) = 2^x 3^y 5^z, where x, y and z are the hundreds, tens, and units digits of n, respectively. If m and v are three-digit positive integers such that f(m) = 9 f(v), then m - v =

A. 8
B. 9
C. 18
D. 20
E. 80

agree with D

let v=321
f(v)= 2^3*3^2*5^1=360
f(m)= 9f(v) so f(m)=3240

factor 3240 = 2^3*3^4*5^1

m=341

m-v=341-321=20
Re: math---function   [#permalink] 08 Oct 2008, 15:42
Display posts from previous: Sort by

# The function f is defined for each positive three-digit

Moderator: chetan2u

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne 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®.