Is rs = rx − 2 ? : GMAT Data Sufficiency (DS)
Check GMAT Club App Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

It is currently 10 Dec 2016, 10:03
GMAT Club 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.

Close

Request Expert Reply

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Is rs = rx − 2 ?

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

Hide Tags

Senior Manager
Senior Manager
avatar
Joined: 10 Jul 2013
Posts: 335
Followers: 3

Kudos [?]: 306 [0], given: 102

Is rs = rx − 2 ? [#permalink]

Show Tags

New post 21 Aug 2013, 16:51
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

64% (02:18) correct 36% (01:14) wrong based on 87 sessions

HideShow timer Statistics

Is rs = rx − 2 ?

(1) r is an odd number
(2) x = s + 2
[Reveal] Spoiler: OA

_________________

Asif vai.....

Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 35950
Followers: 6863

Kudos [?]: 90114 [0], given: 10417

Re: Is rs = rx − 2 ? [#permalink]

Show Tags

New post 22 Aug 2013, 01:58
Is rs = rx − 2 ?

Is \(rs = rx-2\)? --> is \(r(x-s)=2\)?

(1) r is an odd number. Not sufficient: consider r=1 and x-s=2 AND r=1 and x-s=3.

(2) x = s + 2 -->\(x-s=2\) --> the question becomes: is \(r=1\)? We don't know that. Not sufficient.

(1)+(2) From (2) the question became: is \(r=1\)? and (1) says that r=odd, but we don't know whether it's 1 or any other odd number. Not sufficient.

Answer: E.
_________________

New to the Math Forum?
Please read this: 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
avatar
Joined: 24 Aug 2009
Posts: 504
Schools: Harvard, Columbia, Stern, Booth, LSB,
Followers: 17

Kudos [?]: 665 [0], given: 241

Re: Is rs = rx − 2 ? [#permalink]

Show Tags

New post 22 Aug 2013, 03:04
Asifpirlo wrote:
Is rs = rx − 2 ?

(1) r is an odd number
(2) x = s + 2


rs = rx − 2 can be restated as
r(x-s) = 2 -----(1)

Statement 1
r is odd, Still we don't know the value of (x-s).
Thus Insufficient

Statement 2
This is very tempting option for many of us.
(x-s)=2.
we don't know the value of r.
Thus Insufficient

Statement 1& 2
r= odd (can take any odd value 1, 3, 5 etc)
(x-s)=2.
r(x-s) will equal 2 only if r=1. But we don't know value of r for sure
Thus Insufficient

Answer E
_________________

If you like my Question/Explanation or the contribution, Kindly appreciate by pressing KUDOS.
Kudos always maximizes GMATCLUB worth
-Game Theory

If you have any question regarding my post, kindly pm me or else I won't be able to reply

SVP
SVP
User avatar
Joined: 17 Jul 2014
Posts: 2091
Location: United States (IL)
Concentration: Finance, Economics
Schools: Stanford '19
GMAT 1: 550 Q39 V27
GMAT 2: 560 Q42 V26
GMAT 3: 560 Q43 V24
GMAT 4: 650 Q49 V30
WE: General Management (Transportation)
Followers: 18

Kudos [?]: 248 [0], given: 124

GMAT ToolKit User Premium Member Reviews Badge
Re: Is rs = rx − 2 ? [#permalink]

Show Tags

New post 17 Mar 2016, 17:44
Asifpirlo wrote:
Is rs = rx − 2 ?

(1) r is an odd number
(2) x = s + 2


almost tricked me...
rs=rx-2?
2=rx-rs?
2=r(x-s)?

1. r is odd.
if r=1 and r-s =2 then yes.
if r=3 and r-s=2, then no.
A and D out.

2. x=s+2
x-s=2.
if r=1 then yes, if r=3 then no.
B is out.

1+2
we know x-s = 2. and we need to make sure that r is 1. since we cannot clearly say that r=1, C is out and the answer is E.
Re: Is rs = rx − 2 ?   [#permalink] 17 Mar 2016, 17:44
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic If r/s = 2/5 , what is the value of rs ? piyatiwari 4 30 May 2012, 16:27
If (x-6)(x-m)=x2+rx+k. What is the value of m? malkov 1 13 May 2012, 21:50
Is rs=rx-2? 1. r is odd 2. x=s+2 agnok 2 17 May 2010, 12:44
Is rs/(r + s) > 1/2 ? arjtryarjtry 15 01 Sep 2008, 03:24
33 Experts publish their posts in the topic Is r/s^2 a terminating decimal? study 25 12 Jan 2010, 03:27
Display posts from previous: Sort by

Is rs = rx − 2 ?

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


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

Powered by phpBB © phpBB Group and phpBB SEO

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®.