Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 05 Jul 2015, 00:06

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Is rs = rx − 2 ?

Author Message
TAGS:
Senior Manager
Joined: 10 Jul 2013
Posts: 343
Followers: 3

Kudos [?]: 183 [0], given: 102

Is rs = rx − 2 ? [#permalink]  21 Aug 2013, 16:51
00:00

Difficulty:

45% (medium)

Question Stats:

63% (02:11) correct 37% (00:59) wrong based on 58 sessions
Is rs = rx − 2 ?

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

_________________

Asif vai.....

Math Expert
Joined: 02 Sep 2009
Posts: 28272
Followers: 4476

Kudos [?]: 45231 [0], given: 6646

Re: Is rs = rx − 2 ? [#permalink]  22 Aug 2013, 01:58
Expert's post
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.

_________________
Director
Joined: 24 Aug 2009
Posts: 507
Schools: Harvard, Columbia, Stern, Booth, LSB,
Followers: 10

Kudos [?]: 468 [0], given: 241

Re: Is rs = rx − 2 ? [#permalink]  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

_________________

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

Re: Is rs = rx − 2 ?   [#permalink] 22 Aug 2013, 03:04
Similar topics Replies Last post
Similar
Topics:
If r/s = 2/5 , what is the value of rs ? 4 30 May 2012, 16:27
If (x-6)(x-m)=x2+rx+k. What is the value of m? 1 13 May 2012, 21:50
Is rs=rx-2? 1. r is odd 2. x=s+2 2 17 May 2010, 12:44
12 Is r/s^2 a terminating decimal? 16 23 Feb 2010, 13:23
Is rs = rx -2? (1) r is an odd number (2) x = s +2 Pls 4 31 Oct 2008, 08:17
Display posts from previous: Sort by