Does 2m - 3n = 0 (1) m not = 0 (2) 6m = 9n : GMAT Data Sufficiency (DS)
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 22 Jan 2017, 18:47

### 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

# Does 2m - 3n = 0 (1) m not = 0 (2) 6m = 9n

Author Message
TAGS:

### Hide Tags

Intern
Joined: 22 Aug 2011
Posts: 7
Followers: 0

Kudos [?]: 1 [0], given: 3

Does 2m - 3n = 0 (1) m not = 0 (2) 6m = 9n [#permalink]

### Show Tags

08 Nov 2011, 00:46
2
This post was
BOOKMARKED
00:00

Difficulty:

15% (low)

Question Stats:

82% (01:17) correct 18% (00:29) wrong based on 65 sessions

### HideShow timer Statistics

Does 2m - 3n = 0

(1) m not = 0
(2) 6m = 9n

[Reveal] Spoiler:
The answer is B, but I don't understand why.

1. Can't you rewrite the above as 2m = 3n?

If M is...then N is
3 2
6 4
-3 -2
-6 -4

2. The explanation rewrites 2 as 3(2m = 3n) ad says Suff
[Reveal] Spoiler: OA
Intern
Status: Accepted - SMU, Singapore (Class of 2013)
Joined: 08 Sep 2011
Posts: 27
Location: Singapore
Concentration: Finance, General Management
GMAT 1: 620 Q46 V29
GMAT 2: 710 Q50 V35
WE: Information Technology (Computer Software)
Followers: 3

Kudos [?]: 13 [1] , given: 0

Re: DS from GMAT Prep [#permalink]

### Show Tags

08 Nov 2011, 01:49
1
KUDOS
The question is not asking you to find possible values of (m,n). You are not required to do this at all. All you need to find out is whether 2m -3n = 0

Rewrite the question prompt as -
=> 2m = 3n
=> m/n = 3/2

Statement 1 - m != 0; This tells us nothing about 'n'. Insufficient.
Statement 2 - 6m = 9n => m/n = 3/2 ; The ratio m/n is same as that in the question prompt. Sufficient.

Ans. B
_________________

p!yu\$h
http://gmatclub.com/forum/from-620-to-710-my-gmat-story-test-date-30-oct-122547.html#p995276

Intern
Joined: 09 Mar 2010
Posts: 39
Concentration: Technology, General Management
Schools: McCombs '14
Followers: 0

Kudos [?]: 16 [0], given: 17

Re: DS from GMAT Prep [#permalink]

### Show Tags

08 Nov 2011, 02:40
Damouse wrote:
Does 2m - 3n = 0

1. m not = 0
2. 6m = 9n

The answer is B, but I don't understand why.

1. Can't you rewrite the above as 2m = 3n?

If M is...then N is
3 2
6 4
-3 -2
-6 -4

2. The explanation rewrites 2 as 3(2m = 3n) ad says Suff

The qn says is 2m-3n = 0?
You need to have the values or stat tht gives the result.

i) m is not 0 (may or may not make the stat true)
ii) 6m = 9n implies 2m = 3n so proves the stat 2m-3n = 0 and the stat is true.
Intern
Joined: 29 Jun 2011
Posts: 36
Followers: 0

Kudos [?]: 5 [0], given: 0

Re: DS from GMAT Prep [#permalink]

### Show Tags

15 Feb 2012, 23:33
piyushpachori wrote:
The question is not asking you to find possible values of (m,n). You are not required to do this at all. All you need to find out is whether 2m -3n = 0

Rewrite the question prompt as -
=> 2m = 3n
=> m/n = 3/2

Statement 1 - m != 0; This tells us nothing about 'n'. Insufficient.
Statement 2 - 6m = 9n => m/n = 3/2 ; The ratio m/n is same as that in the question prompt. Sufficient.

Ans. B

I probably complicate myself but still wish to clarify if this can be E.

Since the question didn't indicate it is m & n are both INTEGER, so put fraction into considerations as well.
When I put in
m = 2, n = 3 or m = 1/2, n = 1/3, B comes valid...so isn't it a vague question? or I missed any important step? pls advise..thanks
Math Expert
Joined: 02 Sep 2009
Posts: 36601
Followers: 7097

Kudos [?]: 93479 [0], given: 10563

Re: DS from GMAT Prep [#permalink]

### Show Tags

16 Feb 2012, 00:05
miweekend wrote:
piyushpachori wrote:
The question is not asking you to find possible values of (m,n). You are not required to do this at all. All you need to find out is whether 2m -3n = 0

Rewrite the question prompt as -
=> 2m = 3n
=> m/n = 3/2

Statement 1 - m != 0; This tells us nothing about 'n'. Insufficient.
Statement 2 - 6m = 9n => m/n = 3/2 ; The ratio m/n is same as that in the question prompt. Sufficient.

Ans. B

I probably complicate myself but still wish to clarify if this can be E.

Since the question didn't indicate it is m & n are both INTEGER, so put fraction into considerations as well.
When I put in
m = 2, n = 3 or m = 1/2, n = 1/3, B comes valid...so isn't it a vague question? or I missed any important step? pls advise..thanks

You are right we are not told that m and n are integers, though we can get that statement (2) is sufficeint even not knowing that.

Does 2m - 3n = 0

Question basically asks whether $$2m=3n$$

(1) $$m\neq{0}$$ --> clearly insufficient as no info about n.
(2) $$6m=9n$$ --> reduce by 3: $$2m=3n$$, so this statement directly answers the question (so here it doesn't matter whether m and n are integers). Sufficient.

Hope it's clear.
_________________
GMAT Club Legend
Joined: 09 Sep 2013
Posts: 13508
Followers: 577

Kudos [?]: 163 [0], given: 0

Re: Does 2m - 3n = 0 (1) m not = 0 (2) 6m = 9n [#permalink]

### Show Tags

14 Aug 2016, 05:59
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: Does 2m - 3n = 0 (1) m not = 0 (2) 6m = 9n   [#permalink] 14 Aug 2016, 05:59
Similar topics Replies Last post
Similar
Topics:
If z=(m + m/3)(n+2/(n^(-1)) and mn#0, what is the value of Z? 4 13 Jan 2016, 09:47
29 Is M<0? (1) -M = |-M| (2) M^2 = 9 24 27 Aug 2010, 13:35
5 If vmt≠0, is v^2*m^3*t^(-4)>0? 7 21 Jul 2010, 17:06
12 Is M < 0? 1) -M = |-M| 2) M^2 = 9 6 25 Feb 2010, 19:49
20 If vmt ≠ 0, is v^2m^3t^-4 > 0? 15 02 Feb 2009, 22:05
Display posts from previous: Sort by