GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 17 Oct 2019, 01:30

### 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

# What is the numerical value of the expression (3m - n)/(n - m)?

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 58427
What is the numerical value of the expression (3m - n)/(n - m)?  [#permalink]

### Show Tags

14 Jan 2018, 06:01
00:00

Difficulty:

55% (hard)

Question Stats:

41% (01:27) correct 59% (01:59) wrong based on 45 sessions

### HideShow timer Statistics

What is the numerical value of the expression (3m - n)/(n - m)?

(1) 2m/(n - m) = 7/3
(2) n – m = 6

_________________
Intern
Joined: 27 Dec 2017
Posts: 26
Re: What is the numerical value of the expression (3m - n)/(n - m)?  [#permalink]

### Show Tags

14 Jan 2018, 06:07
As we have 2 variable and 2 equations..it's c

study mode
Math Expert
Joined: 02 Aug 2009
Posts: 7960
Re: What is the numerical value of the expression (3m - n)/(n - m)?  [#permalink]

### Show Tags

14 Jan 2018, 06:13
Binggm14 wrote:
As we have 2 variable and 2 equations..it's c

study mode

Don't go with assumption always..
work on the equation..

Quote:
What is the numerical value of the expression $$\frac{(3m - n)}{(n - m)}$$?

$$\frac{(3m - n)}{(n - m)}=\frac{2m+m-n}{n-m}=\frac{2m}{n-m}+\frac{m-n}{n-m}=\frac{2m}{n-m}-1$$

(1) $$\frac{2m}{(n - m)} = \frac{7}{3}$$..
exactly what we are looking for..
$$\frac{2m}{n-m}-1=\frac{7}{3}-1=\frac{4}{3}$$
suff

(2) n – m = 6
nothing much
insuff

A
_________________
Intern
Joined: 17 Oct 2017
Posts: 2
Re: What is the numerical value of the expression (3m - n)/(n - m)?  [#permalink]

### Show Tags

14 Jan 2018, 13:21
chetan2u I am not sure you can assume:
(m-n)/(n-m) =-1
If both m & n are negative then the division would lead to +1.

If such scenario is possible, then, there is more than one result possible and A can't be right.
Math Expert
Joined: 02 Aug 2009
Posts: 7960
Re: What is the numerical value of the expression (3m - n)/(n - m)?  [#permalink]

### Show Tags

14 Jan 2018, 19:17
bbg wrote:
chetan2u I am not sure you can assume:
(m-n)/(n-m) =-1
If both m & n are negative then the division would lead to +1.

If such scenario is possible, then, there is more than one result possible and A can't be right.

$$\frac{(m-n)}{(n-m)}=\frac{-(n-m)}{(n-m)}=-1$$

so what ever be the values of m and n, ans will be -1.... ofcourse the denominator cannot be 0 that is $$n-m\neq{0}..n\neq{m}$$

take for example n=-3 and m=-2...
$$\frac{(-2-(-3))}{(-3-(-2))}=\frac{-2+3}{-3+2}=\frac{1}{-1}=-1$$
_________________
Intern
Joined: 27 Dec 2017
Posts: 26
Re: What is the numerical value of the expression (3m - n)/(n - m)?  [#permalink]

### Show Tags

16 Jan 2018, 17:38
Binggm14 wrote:
As we have 2 variable and 2 equations..it's c

study mode

chetan2u wrote:
Binggm14 wrote:
As we have 2 variable and 2 equations..it's c

study mode

Don't go with assumption always..
work on the equation..

Quote:
What is the numerical value of the expression $$\frac{(3m - n)}{(n - m)}$$?

$$\frac{(3m - n)}{(n - m)}=\frac{2m+m-n}{n-m}=\frac{2m}{n-m}+\frac{m-n}{n-m}=\frac{2m}{n-m}-1$$

(1) $$\frac{2m}{(n - m)} = \frac{7}{3}$$..
exactly what we are looking for..
$$\frac{2m}{n-m}-1=\frac{7}{3}-1=\frac{4}{3}$$
suff

(2) n – m = 6
nothing much
insuff

A

Okay thanks ..yeah ..it's A

study mode
Re: What is the numerical value of the expression (3m - n)/(n - m)?   [#permalink] 16 Jan 2018, 17:38
Display posts from previous: Sort by