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

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Manager
Joined: 21 Feb 2009
Posts: 104
If m and r are two numbers on a number line, what is the [#permalink]

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03 Aug 2009, 12:51
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0% (00:00) correct 0% (00:00) wrong based on 0 sessions

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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.

--== Message from GMAT Club Team ==--

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Retired Moderator
Joined: 05 Jul 2006
Posts: 1741

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03 Aug 2009, 13:16
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.[/quote]

FROM 1

/R/ = 3/M/..........INSUFF

FROM 2

for simlicity though m,r can be fractions assume that: /m-r/ = 14 or /m-r/ = 16 ( ie: r , s are semetrecal around 12 on the numbers line)........insuff

both

draw it on the number line

0.......m = 6.......12.......r = 18

suff C
Manager
Joined: 30 May 2009
Posts: 212

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03 Aug 2009, 13:23
I agree answer should be C.

Irrespective of whatever numbers I pick, the final choice that satisfies both (1) and (2) is m=6, r=18.

Hence r=18
Manager
Joined: 21 Feb 2009
Posts: 104

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03 Aug 2009, 15:13
I also marked C but GMATPREP says its E.
Senior Manager
Joined: 17 Jul 2009
Posts: 277
Concentration: Nonprofit, Strategy
GPA: 3.42
WE: Engineering (Computer Hardware)

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03 Aug 2009, 15:43
1
KUDOS
not sufficient data:

didn't specify m/r must be positive, so we have more than 1 choice pairs:
for ex:
if both m and r are positive, then m =6, r = 18
if m is neg, r = pos, then m = -12, r = 36
Retired Moderator
Joined: 05 Jul 2006
Posts: 1741

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03 Aug 2009, 16:05
2 silly mistakes in a row... 3 am ....i will call it a day
Senior Manager
Joined: 17 Jul 2009
Posts: 277
Concentration: Nonprofit, Strategy
GPA: 3.42
WE: Engineering (Computer Hardware)

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03 Aug 2009, 17:47
yezz wrote:
2 silly mistakes in a row... 3 am ....i will call it a day

haha get a cup of coffee and keep going! =P jk, get some rest!

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: Value of r   [#permalink] 03 Aug 2009, 17:47
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