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:

Agree. I also got to the same conclusion but was not sure. I believe it is C also. _________________

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

guys wat is the best way to solve such diffcult problems, other than picking numbers??

the confusion starts when u have to decide whether it is C or E .........

Picking numbers is often necessary in DS inequality problems.

The most important thing is to simplify or rearrange the inequality, in order to ease picking numbers. Look at this case:

If you have

y-2 < x < 2y-6

you instantly see that y>4, since otherwise the inequality won't be fullfilled. If you don't arrange it like this, its hard and time consuming to find the actual set; And the problem beteen E and C may become more apparent.

This question will be easier if you know how to sketch linear graph.

Basic rule for plotting linear graph

1) know basic form of linear graph y = ax + b
2) give x = 0, y = b
3) and give y = 0, x = -b/a
4) When you have (0,b) and (-b/a,0), you can sketch graph quickly

A little note about inequality
1) y > ax + b means all area above ax + b graph
2) y < ax + b means all area below ax + b graph

Ok! now go to our question.

xy > ?

1) x - y > -2 or y < x + 2
sketch graph and see the area below this graph, the area will include quadrant 4 which x is always positive and y is always negative (eg. (5, -4) (2, -3))

xy < 0 in quadrant 4; therefore, 1) is insuff.

2) x - 2y < -6 or y > (x/2) + 3
Sketch graph and notice the area above this graph, the area will include quadrant 2 which x is always negative and y is always positive (eg. (-2, 3) (-1, 8)

xy < 0 in quadrant 2; therefore, 2) is insuff.

3) consider 1) and 2) you will get y < x + 2 and y > (x/2) + 3
these two graph will cross each other at point (2, 4) in quadrant 1
the area of graph 1) and 2) will intersect. The intersect area will appear only in quadrant 1 which x and y are always positive

xy > 0 always; therefore, answer is C)

P.S. Sorry if you have a hard time understand my explanation, English is my second language.

this can be solved using simultaneous equations, since we have two equations,

1. x - y > -2 2. x - 2y < -6

we get X > 2 & Y > 4

Goood solution! _________________

"To dream anything that you want to dream, that is the beauty of the human mind. To do anything that you want to do, that is the strength of the human will. To trust yourself, to test your limits, that is the courage to succeed."

This week went in reviewing all the topics that I have covered in my previous study session. I reviewed all the notes that I have made and started reviewing the Quant...

I was checking my phone all day. I wasn’t sure when I would receive the admission decision from Tepper. I received an acceptance from Goizueta in the early morning...