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 500,000 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:

Re: a GWD math (6) , which hasn't been discussed [#permalink]

Show Tags

20 Aug 2011, 04:19

Jasontuyj2012 wrote:

if xy =/= 0 ( xy is not 0), is x/y=1?

(1) x^2=y^2 (2) xy>0

I chose A

1. x and y can be 1 or -1, 2 or -2 and hence x/y may or may not be =1. hence not suff 2. xy>0 .... x and y can have different values (1,1) (3,2) hence not suff

together both statements we have x and y should be of the same sign ( either -ve or +ve) and hence x/y =1. so C

Re: a GWD math (6) , which hasn't been discussed [#permalink]

Show Tags

20 Aug 2011, 16:15

Rephrase the question: "\(x = y?\)"

Statement 1: \(x^2 = y^2\) implies that \(|x| = |y|\). In the xy-plane this looks like an X (two lines) straight through the origin with slopes of 1 and -1. For \(xy < 0\) (quadrants II and IV), \(y = -x\). For \(xy > 0\) (quadrants I and III), \(y = x\).

If \(|x| = |y|\), x does not have to equal y, it could equal -y. Insufficient.

Statement 2: \(xy > 0\) means that any point occupies either quadrant I or III. x and y could take on any coordinate in these quadrants, such as (4,3), (1000000000000,1), (-452, -2), or (1,1), (-55,-55) etc. We do not know whether x and y are equal. Insufficient.

Combined: |x| = |y| and xy > 0, so x = y. Sufficient.

Its been long time coming. I have always been passionate about poetry. It’s my way of expressing my feelings and emotions. And i feel a person can convey...

Written by Scottish historian Niall Ferguson , the book is subtitled “A Financial History of the World”. There is also a long documentary of the same name that the...

Post-MBA I became very intrigued by how senior leaders navigated their career progression. It was also at this time that I realized I learned nothing about this during my...