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 Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 350,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

In the question it is not mentioned that m is not equal to n If m=n=5 then the ratio is indefinite! Hence 2 is not suffucient and we need 1 to solve this (just to make sure that m<>n)

In the question it is not mentioned that m is not equal to n If m=n=5 then the ratio is indefinite! Hence 2 is not suffucient and we need 1 to solve this (just to make sure that m<>n)

Any comments?

M and N can't be equal because division by 0 would occur. Answer is B.

I do not remmember the source, but ETS does not take the x/0 equation at anytime. As this will lead to infinity (anything by zero is not valid). Hence, the above answer B is valid.

Perhaps, others can put some info they have obtained. _________________

I was inclined to go ahead and put down 'B' for answer, but then I thought of testing possible values for m and n in (m^2-n^2) = 40
(m+n)(m-n) = 40
the only values I could come up with are:
(7+3)(7-3)=40

thisquestion is from ETS official guide 10 th edition

Folks,

I also chose C because of the m<>n thing
But OA is B
I guess the Q is poorly framed;
In most cases Qs clearly mention "m<>n" in cases where divide by zero is a possibility

The source of this Qusetion and Answer is from internet.

Rahul, If this Q is in OG, could you please check and tell us what the OA is in ETS OG?

Wow...I'm still reeling from my HBS admit . Thank you once again to everyone who has helped me through this process. Every year, USNews releases their rankings of...

I had an interesting conversation with a friend this morning, and I realized I need to add a last word on the series of posts on my application process. Five key words:...