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Does 2m - 3n = 0 (1) m ≠ 0 (2) 6m = 9n
[#permalink]
08 Nov 2011, 01:46
08 Nov 2011, 01:46
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Does 2m - 3n = 0
(1) m ≠ 0
(2) 6m = 9n
(1) m ≠ 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
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
Intern
Joined: 08 Sep 2011
Status:Accepted - SMU, Singapore (Class of 2013)
Posts: 22
Given Kudos: 0
Location: Singapore
Concentration: Finance, General Management
GMAT 1: 620 Q46 V29
GMAT 2: 710 Q50 V35
WE:Information Technology (Computer Software)
Re: Does 2m - 3n = 0 (1) m ≠ 0 (2) 6m = 9n
[#permalink]
08 Nov 2011, 02:49
08 Nov 2011, 02:49
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
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
Intern
Joined: 09 Mar 2010
Posts: 14
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Concentration: Technology, General Management
Schools: McCombs '14
Re: Does 2m - 3n = 0 (1) m ≠ 0 (2) 6m = 9n
[#permalink]
08 Nov 2011, 03:40
08 Nov 2011, 03:40
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
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.
