20/2^5=1/2^m+1/2^n,where m and n are integers, mn= : PS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 18 Jan 2017, 12:37

### 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

# 20/2^5=1/2^m+1/2^n,where m and n are integers, mn=

Author Message
Manager
Joined: 01 Nov 2007
Posts: 101
Followers: 1

Kudos [?]: 57 [0], given: 0

20/2^5=1/2^m+1/2^n,where m and n are integers, mn= [#permalink]

### Show Tags

10 Mar 2008, 01:03
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

20/2^5=1/2^m+1/2^n,where m and n are integers, mn=?
Director
Joined: 05 Jan 2008
Posts: 701
Followers: 5

Kudos [?]: 415 [0], given: 0

### Show Tags

10 Mar 2008, 01:38
Is it mn=3

20/2^5=1/2^m+1/2^n,where m and n are integers, mn=?
=> 5/8= 1/2^m + 1/2^n solving for m & n we get m=1, n=3

thus mn=3
_________________

Persistence+Patience+Persistence+Patience=G...O...A...L

Director
Joined: 01 Jan 2008
Posts: 629
Followers: 4

Kudos [?]: 175 [0], given: 1

### Show Tags

10 Mar 2008, 05:52
prasannar wrote:
Is it mn=3

20/2^5=1/2^m+1/2^n,where m and n are integers, mn=?
=> 5/8= 1/2^m + 1/2^n solving for m & n we get m=1, n=3

thus mn=3

i agree. 20/2^5 = 5/2^3 = (4+1)/2^3 = 1/2^1 + 1/2^3 -> mn = 3
Re: PS (exponents)   [#permalink] 10 Mar 2008, 05:52
Display posts from previous: Sort by