It is currently 27 Jun 2017, 12:45

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

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

Author Message
Director
Joined: 17 Oct 2005
Posts: 928
If m and r are two numbers on a number line, what is the [#permalink]

Show Tags

18 Dec 2005, 17:58
00:00

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.

If 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
Director
Joined: 14 Sep 2005
Posts: 985
Location: South Korea

Show Tags

18 Dec 2005, 23:13
joemama142000 wrote:
If 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

Distance between X and Y on a number line = | X - Y |

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

| r | = 3 x | m |

r = -3m or 3m

Insufficient.

2) 12 is halfway between m and r.

( m + r ) / 2 = 12

m + r = 24

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

If r = -3m, m + r = -3m + m = -2m = 24 ---> m = -12, r = 36
If r = 3m, m + r = 3m + m = 4m = 24 ---> m = 6, r = 18

Insufficient.

I vote for (E).[/b]
_________________

Auge um Auge, Zahn um Zahn !

SVP
Joined: 05 Apr 2005
Posts: 1710

Show Tags

18 Dec 2005, 23:25
joemama142000 wrote:
If 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

its E. the order of m, r and o could be any with the above constraints...
Senior Manager
Joined: 15 Apr 2005
Posts: 415
Location: India, Chennai

Show Tags

18 Dec 2005, 23:41
One more for E, and my working is same as gamjatang
Director
Joined: 17 Oct 2005
Posts: 928

Show Tags

19 Dec 2005, 12:36
great explanation , the oa is E
19 Dec 2005, 12:36
Display posts from previous: Sort by