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:
Rgds, TGC! _____________________________________________________________________ I Assisted You => KUDOS Please _____________________________________________________________________________
Last edited by Bunuel on 17 Mar 2013, 00:37, edited 1 time in total.
Statement (1) : Tells the sign of (C) means sufficient.
Statement (2) : a+b < 0
=> a < -b
a b a<-b Is a>b? + + Not Poss N/A - - Yes No - + Yes No + - Yes No
Why the answer is not (D).
Please tell what I am missing above
Rgds, TGC _________________
Rgds, TGC! _____________________________________________________________________ I Assisted You => KUDOS Please _____________________________________________________________________________
Re: If (a-b)/c<0, is a>b? [#permalink]
17 Mar 2013, 00:46
Before cross multiplying or multiplying numerator and denominator by c you should keep in mind that c should not be equal to 0 So which statement proves c won't be 0 (1) c < 0 This statement implies that c is not equal to 0 (2) a + b < 0 You aren't sure whether c would be 0 or not. Hence, the answer should be A
Re: If (a-b)/c<0, is a>b? [#permalink]
17 Mar 2013, 00:53
1
This post received KUDOS
Expert's post
If (a-b)/c<0, is a>b?
(1) c < 0. Multiply (a-b)/c<0 by negative c and flip the sign a-b>0 --> a>b. Sufficient.
(2) a + b < 0. The sum of two numbers is less than zero. Can we tell which of them is greater? (Can we tell whether a>b or a<b?) No, consider a=1, b=-2 and c=-1 AND a=-2, b=1 and c=1. Not sufficient.
Re: If (a-b)/c<0, is a>b? [#permalink]
17 Mar 2013, 06:14
Bunuel wrote:
If (a-b)/c<0, is a>b?
(1) c < 0. Multiply (a-b)/c<0 by negative c and flip the sign a-b>0 --> a>b. Sufficient.
(2) a + b < 0. The sum of two numbers is less than zero. Can we tell which of them is greater? (Can we tell whether a>b or a<b?) No, consider a=1, b=-2 and c=-1 AND a=-2, b=1 and c=1. Not sufficient.
Answer: A.
What is wrong in the solution that I gave?
Rgds, TGC _________________
Rgds, TGC! _____________________________________________________________________ I Assisted You => KUDOS Please _____________________________________________________________________________
Statement (1) : Tells the sign of (C) means sufficient.
Statement (2) : a+b < 0
=> a < -b
a b a<-b Is a>b? + + Not Poss N/A - - Yes No - + Yes No + - Yes No
Why the answer is not (D).
Please tell what I am missing above
Rgds, TGC
Consider one of the cases in your approach above: if both a and b are negative, it's possible that a>b as well as a<b. For example, a=-1, b=-2, and c=-1 AND a=-2, b=-1, and c=1.
Statement (1) : Tells the sign of (C) means sufficient.
Statement (2) : a+b < 0
=> a < -b
a b a<-b Is a>b? + + Not Poss N/A - - Yes No - + Yes No + - Yes No
Why the answer is not (D).
Please tell what I am missing above
Rgds, TGC
Consider one of the cases in your approach above: if both a and b are negative, it's possible that a>b as well as a<b. For example, a=-1, b=-2, and c=-1 AND a=-2, b=-1, and c=1.
Hope it helps.
Why to take c variable in picture .
Given that a<-b I think appropriate would be a = -1 b = -2 (here a>b still holding a<-b)
a = -2 b = -1 (here a <b still holding a<-b)
Hence,wrong _________________
Rgds, TGC! _____________________________________________________________________ I Assisted You => KUDOS Please _____________________________________________________________________________
Statement (1) : Tells the sign of (C) means sufficient.
Statement (2) : a+b < 0
=> a < -b
a b a<-b Is a>b? + + Not Poss N/A - - Yes No - + Yes No + - Yes No
Why the answer is not (D).
Please tell what I am missing above
Rgds, TGC
Consider one of the cases in your approach above: if both a and b are negative, it's possible that a>b as well as a<b. For example, a=-1, b=-2, and c=-1 AND a=-2, b=-1, and c=1.
Hope it helps.
Why to take c variable in picture .
Given that a<-b I think appropriate would be a = -1 b = -2 (here a>b still holding a<-b)
a = -2 b = -1 (here a <b still holding a<-b)
Hence,wrong
Hi TGC good to see you back on the forums..........people gather courage from life's storms.
I think the process you suggested is correct and has got no flaws in it....its concise...i do not find any use of third variable here.
The “3 golden nuggets” of MBA admission process With ten years of experience helping prospective students with MBA admissions and career progression, I will be writing this blog through...
You know what’s worse than getting a ding at one of your dreams schools . Yes its getting that horrid wait-listed email . This limbo is frustrating as hell . Somewhere...