What is the value of m-3n? (1) m^2 = 9n^2 (2) m = -3n : DS Archive
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 19 Jan 2017, 01:59

### 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

# What is the value of m-3n? (1) m^2 = 9n^2 (2) m = -3n

Author Message
Intern
Joined: 26 Feb 2008
Posts: 37
Followers: 0

Kudos [?]: 7 [0], given: 0

What is the value of m-3n? (1) m^2 = 9n^2 (2) m = -3n [#permalink]

### Show Tags

29 Feb 2008, 12:40
1
This post was
BOOKMARKED
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 2 sessions

### HideShow timer Statistics

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

What is the value of m-3n?

(1) m^2 = 9n^2

(2) m = -3n
Director
Joined: 26 Jul 2007
Posts: 541
Schools: Stern, McCombs, Marshall, Wharton
Followers: 7

Kudos [?]: 158 [0], given: 0

### Show Tags

29 Feb 2008, 12:56
shils01 wrote:
What is the value of m-3n?

(1) m^2 = 9n^2

(2) m = -3n

I get E.

Stmt 1: Square both sides and you get m= 3n,-3n
If m=3n then 3n-3n=0
If m=-3n then -3n-3n=-6n

Stmt 2: m=-3n, so:
-3n-3n=-6n

Since we dont know what n is, it's insuff.
SVP
Joined: 28 Dec 2005
Posts: 1575
Followers: 3

Kudos [?]: 147 [0], given: 2

### Show Tags

01 Mar 2008, 15:49
E ?

from stat 1, we get (m-3n)(m+3n)=0, cant get any info about n. insuff.

from stat 2, we still cant get a value for n. insuff.

together, we still cant get a value for n. not that i can see, anyways.
Re: DS   [#permalink] 01 Mar 2008, 15:49
Display posts from previous: Sort by