It is currently 17 Oct 2017, 15:46

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

m and r are two numbers on a number line, what is the value

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Manager
Manager
avatar
Joined: 21 Aug 2008
Posts: 201

Kudos [?]: 18 [0], given: 0

m and r are two numbers on a number line, what is the value [#permalink]

Show Tags

New post 27 Sep 2008, 19:57
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

m and r are two numbers on a number line, what is the value of r?

(1) The distance between r and 0 is 3 times the distance between m and 0

(2) 12 is halfway between m and r

I don't understand the OA. Pls help me out. THx.

Kudos [?]: 18 [0], given: 0

SVP
SVP
User avatar
Joined: 29 Aug 2007
Posts: 2472

Kudos [?]: 842 [0], given: 19

Re: DS - Value of r [#permalink]

Show Tags

New post 27 Sep 2008, 21:19
Richardson wrote:
m and r are two numbers on a number line, what is the value of r?

(1) The distance between r and 0 is 3 times the distance between m and 0
(2) 12 is halfway between m and r

I don't understand the OA. Pls help me out. THx.


1: r and m, both or either, could be -ve or +ve.
for ex: m = 5 and r = 15 hold ro = 3 mo. here r =5
m = -5 and r = 15 also hold the same. r = -5
nsf.

2: if 12 is half way bet r and m, r and m could have any value and either one be on the RHS or LHS. so nsf.

1&2: also nsf.

if m = -12, r = 36, 12 is half ways between r and m and ro = 3 mo.
if m = 6, r = 18, 12 is still halfway between r and m and ro = 3 mo.

so //E//
_________________

Verbal: http://gmatclub.com/forum/new-to-the-verbal-forum-please-read-this-first-77546.html
Math: http://gmatclub.com/forum/new-to-the-math-forum-please-read-this-first-77764.html
Gmat: http://gmatclub.com/forum/everything-you-need-to-prepare-for-the-gmat-revised-77983.html


GT

Kudos [?]: 842 [0], given: 19

Manager
Manager
avatar
Joined: 22 Sep 2008
Posts: 121

Kudos [?]: 48 [0], given: 0

Re: DS - Value of r [#permalink]

Show Tags

New post 29 Sep 2008, 11:09
hey ..

how this come to your mind?

" if m = -12, r = 36, 12 is half ways between r and m and ro = 3 mo."

I mark C once i guess 6,18 for m & r,but i never thought of -12 and 36

Kudos [?]: 48 [0], given: 0

Intern
Intern
avatar
Joined: 29 Sep 2008
Posts: 46

Kudos [?]: 9 [0], given: 0

Re: DS - Value of r [#permalink]

Show Tags

New post 29 Sep 2008, 16:48
both are not sufficient together. Since 12 is mid point, r + m = 24 and |r|=3|m| => r = +-m
solve for r to get 6 or -12.

Kudos [?]: 9 [0], given: 0

Manager
Manager
avatar
Joined: 21 Aug 2008
Posts: 201

Kudos [?]: 18 [0], given: 0

Re: DS - Value of r [#permalink]

Show Tags

New post 30 Sep 2008, 04:18
aim2010 wrote:
both are not sufficient together. Since 12 is mid point, r + m = 24 and |r|=3|m| => r = +-m
solve for r to get 6 or -12.


Got that I missed -12/36 combination. OA is E>

Kudos [?]: 18 [0], given: 0

VP
VP
User avatar
Joined: 18 May 2008
Posts: 1259

Kudos [?]: 526 [0], given: 0

Re: DS - Value of r [#permalink]

Show Tags

New post 30 Sep 2008, 06:29
Richardson, can u tell me whts the source?
Richardson wrote:
m and r are two numbers on a number line, what is the value of r?

(1) The distance between r and 0 is 3 times the distance between m and 0

(2) 12 is halfway between m and r

I don't understand the OA. Pls help me out. THx.

Kudos [?]: 526 [0], given: 0

Manager
Manager
avatar
Joined: 21 Aug 2008
Posts: 201

Kudos [?]: 18 [0], given: 0

Re: DS - Value of r [#permalink]

Show Tags

New post 01 Oct 2008, 06:48
ritula wrote:
Richardson, can u tell me whts the source?
Richardson wrote:
m and r are two numbers on a number line, what is the value of r?

(1) The distance between r and 0 is 3 times the distance between m and 0

(2) 12 is halfway between m and r

I don't understand the OA. Pls help me out. THx.


It's from GMAPrep (second test).

Kudos [?]: 18 [0], given: 0

VP
VP
User avatar
Joined: 18 May 2008
Posts: 1259

Kudos [?]: 526 [0], given: 0

Re: DS - Value of r [#permalink]

Show Tags

New post 01 Oct 2008, 16:57
I know it is very basic question, but can u tell me how did u solve to get value r=-36?
aim2010 wrote:
both are not sufficient together. Since 12 is mid point, r + m = 24 and |r|=3|m| => r = +-m
solve for r to get 6 or -12.

Kudos [?]: 526 [0], given: 0

Intern
Intern
avatar
Joined: 29 Sep 2008
Posts: 46

Kudos [?]: 9 [0], given: 0

Re: DS - Value of r [#permalink]

Show Tags

New post 01 Oct 2008, 18:55
ritula wrote:
I know it is very basic question, but can u tell me how did u solve to get value r=-36?
aim2010 wrote:
both are not sufficient together. Since 12 is mid point, r + m = 24 and |r|=3|m| => r = +-m
solve for r to get 6 or -12.


r + m = 24

|r| = 3|m| => r = 3m or -3m

substitute r = 3m to get m = 6 and r = 18
substitute r = -3m to get m = -12 and r = 36

Kudos [?]: 9 [0], given: 0

Intern
Intern
avatar
Joined: 29 Sep 2008
Posts: 46

Kudos [?]: 9 [0], given: 0

Re: DS - Value of r [#permalink]

Show Tags

New post 01 Oct 2008, 18:57
i hope it is clear now, let me know if it still does not make sense.

Kudos [?]: 9 [0], given: 0

VP
VP
avatar
Joined: 17 Jun 2008
Posts: 1374

Kudos [?]: 406 [0], given: 0

Re: DS - Value of r [#permalink]

Show Tags

New post 01 Oct 2008, 22:38
Richardson wrote:
m and r are two numbers on a number line, what is the value of r?

(1) The distance between r and 0 is 3 times the distance between m and 0

(2) 12 is halfway between m and r

I don't understand the OA. Pls help me out. THx.

IMO E
1)|r|=3|m|
with al the values of m , val of r changes INSUFFI

2) r-m=12 or m-r =12 => with diff m can change !!!

COMBINING BOTH
say r =3m then m=6 ,r=6or m= -6,r=-18 hence INSUFFI
_________________

cheers
Its Now Or Never

Kudos [?]: 406 [0], given: 0

VP
VP
User avatar
Joined: 18 May 2008
Posts: 1259

Kudos [?]: 526 [0], given: 0

Re: DS - Value of r [#permalink]

Show Tags

New post 02 Oct 2008, 07:56
Oh yes. dats so simple. Silly me. I ignored negative value
:oops:
aim2010 wrote:
i hope it is clear now, let me know if it still does not make sense.

Kudos [?]: 526 [0], given: 0

Re: DS - Value of r   [#permalink] 02 Oct 2008, 07:56
Display posts from previous: Sort by

m and r are two numbers on a number line, what is the value

  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 | 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®.