It is currently 09 Dec 2018, 22:25
My Tests

Close

GMAT Club Daily Prep

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.

Quantitative comparision

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
Joined: 25 Oct 2017
Posts: 4
Followers: 0

Kudos [?]: 1 [0], given: 1

Quantitative comparision [#permalink] New post 25 Oct 2017, 01:39
00:00

Question Stats:

100% (00:22) correct 0% (00:00) wrong based on 3 sessions
Can anyone tell me
\(a\neq b\)
Quantity A
Quantity B
\(\frac{(a-b)}{(b-a)}\)
1


Manhattan 5lb answer => (a-b)/-(a-b) = -1 so B is correct (Understood)

but why can't we do this like

1) \(\frac{a-b}{b-a}\) [?] 1
2)(a-b) [?] (b-a) multiplying b-a on both sides
3)(a-b) [?] -(a-b) dividing by (a-b)
4)1 > -1
A is greater according to this method can I know why I cant do this like
[Reveal] Spoiler: OA

Last edited by nikkikoneru on 25 Oct 2017, 02:23, edited 4 times in total.
Moderator
Moderator
User avatar
Joined: 18 Apr 2015
Posts: 5122
Followers: 76

Kudos [?]: 1022 [0], given: 4624

CAT Tests
Re: Quantitative comparision [#permalink] New post 25 Oct 2017, 02:06
Expert's post
Please follow the rules for posting on the board

rules-for-posting-please-read-this-before-posting-1083.html

edit the question in the proper manner.

Thank you for your collaboration
_________________

Get the 2 FREE GREPrepclub Tests

1 KUDOS received
Intern
Intern
Joined: 25 Oct 2017
Posts: 4
Followers: 0

Kudos [?]: 1 [1] , given: 1

Re: Quantitative comparision [#permalink] New post 25 Oct 2017, 02:25
1
This post received
KUDOS
Carcass wrote:
Please follow the rules for posting on the board


edit the question in the proper manner.

Done :o can you please explain it now sir


Thank you for your collaboration
1 KUDOS received
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jun 2014
Posts: 4749
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 93

Kudos [?]: 1650 [1] , given: 396

CAT Tests
Re: Quantitative comparision [#permalink] New post 25 Oct 2017, 04:13
1
This post received
KUDOS
Expert's post
We can't do this because multiplication with a negative number flips the sign of an inequlality

Say \(5 < 7\) multiply -1 both sides we get

\(-5 > =7\). Similarly when you multiply (b-a) to both sides it flips the in eqaulity making Quanity A greater which is incorrect!

Never nultiply varianles whose sign you don't know to both sides of an inequality!
_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Intern
Intern
Joined: 25 Oct 2017
Posts: 4
Followers: 0

Kudos [?]: 1 [0], given: 1

Re: Quantitative comparision [#permalink] New post 25 Oct 2017, 05:17
sandy wrote:
We can't do this because multiplication with a negative number flips the sign of an inequlality

Say \(5 < 7\) multiply -1 both sides we get

\(-5 > =7\). Similarly when you multiply (b-a) to both sides it flips the in eqaulity making Quanity A greater which is incorrect!

Never nultiply varianles whose sign you don't know to both sides of an inequality!




Thank you.
Re: Quantitative comparision   [#permalink] 25 Oct 2017, 05:17
Display posts from previous: Sort by

Quantitative comparision

  Question banks Downloads My Bookmarks Reviews Important topics  


GRE Prep Club Forum Home| About| Terms and Conditions and Privacy Policy| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.