GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 19 Aug 2018, 08:23

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.

Close

Request Expert Reply

Confirm Cancel

If x/y = 2/3, then (x + y)/(x - y) = ?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Manager
Manager
avatar
Joined: 01 Aug 2013
Posts: 93
Schools: LBS '18 (S)
If x/y = 2/3, then (x + y)/(x - y) = ?  [#permalink]

Show Tags

New post Updated on: 12 May 2014, 06:39
1
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

87% (00:47) correct 13% (00:55) wrong based on 157 sessions

HideShow timer Statistics

If x/y = 2/3, then (x + y)/(x - y) = ?

A. 5
B. 1/5
C. -1/6
D. -1/5
E. -5

Originally posted by brobeedle on 12 May 2014, 06:28.
Last edited by Bunuel on 12 May 2014, 06:39, edited 1 time in total.
Renamed the topic and edited the question.
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 47983
Re: Algebra PS Question - please help!  [#permalink]

Show Tags

New post 12 May 2014, 06:43
brobeedle wrote:
if x/y = 2/3; then x+y/x-y = ?

a. 5
b. 1/5
c. -1/6
d. -1/5
e. -5


If x/y = 2/3, then (x + y)/(x - y) = ?

A. 5
B. 1/5
C. -1/6
D. -1/5
E. -5

Any x and y satisfying x/y = 2/3 should give the same value for (x + y)/(x - y).

Say x=2 and y=3, then (x + y)/(x - y) = (2 + 3)/(2-3) = -5.

Answer: E.

P.S. Please read carefully and follow: rules-for-posting-please-read-this-before-posting-133935.html Pay attention to rules 3, and 5. Thank you.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Director
Director
User avatar
Joined: 25 Apr 2012
Posts: 701
Location: India
GPA: 3.21
WE: Business Development (Other)
Premium Member Reviews Badge
Re: If x/y = 2/3, then (x + y)/(x - y) = ?  [#permalink]

Show Tags

New post 13 May 2014, 01:21
brobeedle wrote:
If x/y = 2/3, then (x + y)/(x - y) = ?

A. 5
B. 1/5
C. -1/6
D. -1/5
E. -5


Another way:

Given x/y = 2/3

Add 1 to both sides and we get \((x+y)/y= 5/3 or (x+y)= 5y/3\)
Subract 1 from both sides and we get
(x-y)/y= -1/3 or (x-y) =-y./3

So we have \((x+y)/(x-y)= (5y/3)/(-y/3) or -5\)
Ans is E
_________________


“If you can't fly then run, if you can't run then walk, if you can't walk then crawl, but whatever you do you have to keep moving forward.”

SVP
SVP
User avatar
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1835
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
If x/y = 2/3, then (x + y)/(x - y) = ?  [#permalink]

Show Tags

New post 01 Aug 2014, 01:12
\(\frac{x}{y} = \frac{2}{3}\)

Using componendo / dividendo

\(\frac{x+y}{y} = \frac{2+3}{3} = \frac{5}{3}\) ................. (1)

\(\frac{x-y}{y} = \frac{2-3}{3} =\frac{-1}{3}\) ................... (2)

Divide (1) by (2)

\(\frac{x+y}{x-y} = -5\)

Answer = E
_________________

Kindly press "+1 Kudos" to appreciate :)

Intern
Intern
avatar
Joined: 06 Apr 2014
Posts: 8
Location: United States (MI)
Concentration: Marketing, International Business
GPA: 3.4
GMAT ToolKit User
Re: If x/y = 2/3, then (x + y)/(x - y) = ?  [#permalink]

Show Tags

New post 03 Aug 2014, 16:54
x/y=2/3, so x = (2/3)y
(x+y)/(x-y) = [ (2/3)y +y] / [(2/3)y -y] = [(5/3)y] / [(-1/3)y] = (5/3) * (-3) = -5
Board of Directors
User avatar
P
Status: QA & VA Forum Moderator
Joined: 11 Jun 2011
Posts: 3784
Location: India
GPA: 3.5
WE: Business Development (Commercial Banking)
GMAT ToolKit User Premium Member
Re: If x/y = 2/3, then (x + y)/(x - y) = ?  [#permalink]

Show Tags

New post 18 Dec 2017, 11:16
brobeedle wrote:
If x/y = 2/3, then (x + y)/(x - y) = ?

A. 5
B. 1/5
C. -1/6
D. -1/5
E. -5

Plug in x = 2 & y = 3

\(\frac{(x + y)}{(x - y)} = \frac{(2 + 3)}{( 2 - 3 )}\)

Or , \(\frac{(x + y)}{(x - y)} = \frac{5}{-1} = -5\)

Answer will be (E) \(-5\)
_________________

Thanks and Regards

Abhishek....

PLEASE FOLLOW THE RULES FOR POSTING IN QA AND VA FORUM AND USE SEARCH FUNCTION BEFORE POSTING NEW QUESTIONS

How to use Search Function in GMAT Club | Rules for Posting in QA forum | Writing Mathematical Formulas |Rules for Posting in VA forum | Request Expert's Reply ( VA Forum Only )

Re: If x/y = 2/3, then (x + y)/(x - y) = ? &nbs [#permalink] 18 Dec 2017, 11:16
Display posts from previous: Sort by

If x/y = 2/3, then (x + y)/(x - y) = ?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Events & Promotions

PREV
NEXT


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.