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:

Isn't it always the case that if X+Y>0 then X>-Y. I know that it's an easy one, I just can't get my mind around it. I am solving the hard questions but then my mind blocks on the easy ones.

Yes IT IS TRUE ALWAYS! X+Y > 0 take Y to the other side or subtract both the sides by Y we get: X+Y - Y > 0 - Y => X > -Y

score780 wrote:

DS question:

Is X+Y positive? 1-X-Y is positive 2-Y>0

Question is is X + Y > 0 STAT1 X-Y > 0 => X > Y Only thing which this option tells us is that X is greater than Y Now, X and Y can both be negative then X + Y < 0 X can be positive and Y can be negative and |Y| > |X| then X + Y <0 X can be positive and Y can be negative and |Y| = |X| then X + Y =0 X can be positive and Y can be negative and |Y| < |X| then X + Y >0 X and Y can both be positive, in this case X + Y > 0 So, NOT Sufficient

STAT2 Y > 0 This is not sufficient as we have no information about X

STAT1 and STAT2 together give us that X > Y and Y is positive so, obviously X will also be positive Hence, X + Y >0 (because both X and Y are positive) So, answer will be C

Question is is X + Y > 0 STAT1 X-Y > 0 => X > Y Only thing which this option tells us is that X is greater than Y Now, X and Y can both be negative then X + Y < 0 X can be positive and Y can be negative and |Y| > |X| then X + Y <0 X can be positive and Y can be negative and |Y| = |X| then X + Y =0 X can be positive and Y can be negative and |Y| < |X| then X + Y >0 X and Y can both be positive, in this case X + Y > 0 So, NOT Sufficient

Thank you very much. I am just confused about the statements where you included absolute values. You say X+Y can both be negative then X+Y<0, this I understand. Then you say "X can be positive and Y can be negative and |Y| > |X| then X + Y <0". Is it possible for you please to explain this and how it links to assessing if stat 1 is sufficient.

Question is is X + Y > 0 STAT1 X-Y > 0 => X > Y Only thing which this option tells us is that X is greater than Y Now, X and Y can both be negative then X + Y < 0 X can be positive and Y can be negative and |Y| > |X| then X + Y <0 X can be positive and Y can be negative and |Y| = |X| then X + Y =0 X can be positive and Y can be negative and |Y| < |X| then X + Y >0 X and Y can both be positive, in this case X + Y > 0 So, NOT Sufficient

Thank you very much. I am just confused about the statements where you included absolute values. You say X+Y can both be negative then X+Y<0, this I understand. Then you say "X can be positive and Y can be negative and |Y| > |X| then X + Y <0". Is it possible for you please to explain this and how it links to assessing if stat 1 is sufficient.

All the cases of STAT1 with examples are explained below in detail:-- -> Now, X and Y can both be negative then X + Y < 0 Ex:- X= -1 Y =-2 then, X+Y = -1 + (-2) = -3 which is less than zero so X+Y < 0 (it helps in proving that in some cases X + Y < 0 i.e. X+Y is NOT positive)

-> X can be positive and Y can be negative and |Y| > |X| then X + Y <0 X = 6 Y = -9 then |X| = 6 and |Y| = 9 so, |X| < |Y| so, X + Y = 6 + (-9) = -3 which is less than zero So, X + Y < 0 (it helps in proving that in some cases X + Y < 0 i.e. X+Y is NOT positive)

-> X can be positive and Y can be negative and |Y| = |X| then X + Y =0 X = 6, Y = -6 then, |Y| = 6 and |X| = 6 so, |X| = |Y| so, X + Y = 6 + (-6) = 0 X + Y = 0 (it helps in proving that in some cases X + Y = 0 i.e. X+Y is NOT positive)

-> X can be positive and Y can be negative and |Y| < |X| then X + Y >0 X= 7, Y =-3 then |X| = 7 and |Y| = 3 so, |X| > |Y| X + Y > 0 (it helps in proving that in some cases X + Y > 0 i.e. X+Y is positive)

-> X and Y can both be positive, in this case X + Y > 0 X = 3, Y =4 then, X + Y = 3+4 = 7 So, X + Y > 0 (it helps in proving that in some cases X + Y > 0 i.e. X+Y is positive)

So, in some cases X + Y is positive and in some case it is NOT. So, Statement 1 is not sufficient.

Question is is X + Y > 0 STAT1 X-Y > 0 => X > Y Only thing which this option tells us is that X is greater than Y Now, X and Y can both be negative then X + Y < 0 X can be positive and Y can be negative and |Y| > |X| then X + Y <0 X can be positive and Y can be negative and |Y| = |X| then X + Y =0 X can be positive and Y can be negative and |Y| < |X| then X + Y >0 X and Y can both be positive, in this case X + Y > 0 So, NOT Sufficient

Thanks again. I understand all your analysis. But what I am not being able to understand is how did you make the link of stat 1 to the analysis you made on X+Y>0 and say it's insufficient.

Question is is X + Y > 0 STAT1 X-Y > 0 => X > Y Only thing which this option tells us is that X is greater than Y Now, X and Y can both be negative then X + Y < 0 X can be positive and Y can be negative and |Y| > |X| then X + Y <0 X can be positive and Y can be negative and |Y| = |X| then X + Y =0 X can be positive and Y can be negative and |Y| < |X| then X + Y >0 X and Y can both be positive, in this case X + Y > 0 So, NOT Sufficient

Thanks again. I understand all your analysis. But what I am not being able to understand is how did you make the link of stat 1 to the analysis you made on X+Y>0 and say it's insufficient.

Its because stat1 in some cases gives X + Y > 0 and in some cases gives X + Y < 0 and in one case X + Y = 0 Since, it is not giving a common answer to whether X + Y > 0 So it is insufficient to answer.

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...

I started running as a cross country team member since highshcool and what’s really awesome about running is that...you never get bored of it! I participated in...