Math problems from the *free* official practice tests and
problems from mba.com
mjogan
Course Students
 
Posts: 1
Joined: Wed Dec 31, 1969 8:00 pm
 

GMAT Prep Math Question

by mjogan Tue Jun 21, 2011 9:48 pm

If m>0 and n>0, is (m+x)/(n+x) > m/n?

1) m<n
2) x>0

Answer: C

I'm having trouble manipulating the inequality in the question. Once you bring m/n to the left side, how do you get x(n-m)/n(n+x)? I saw that in a previous post.

Thanks
george.kourdin
Course Students
 
Posts: 97
Joined: Tue Oct 06, 2009 9:55 am
 

Re: GMAT Prep Math Question

by george.kourdin Wed Jun 22, 2011 8:45 am

i realize that this doesn't answer your question, but why do we need to simplify the equation - move stuff around?

for us to answer whether m+x/n+x to be > m/n two things need to be true

1) x ! = 0
2) we need to know the relationship between m and n
RonPurewal
Students
 
Posts: 19744
Joined: Tue Aug 14, 2007 8:23 am
 

Re: GMAT Prep Math Question

by RonPurewal Wed Jun 29, 2011 6:05 am

please read this thread and post any questions that you may have there, not here.
if-m-0-and-n-0-is-m-x-n-x-m-n-t8202.html