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

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Manager
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Joined: 21 Feb 2009
Posts: 108

Kudos [?]: 96 [0], given: 4

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

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New post 03 Aug 2009, 12:51
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A
B
C
D
E

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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.

Kudos [?]: 96 [0], given: 4

SVP
SVP
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B
Joined: 05 Jul 2006
Posts: 1750

Kudos [?]: 430 [0], given: 49

GMAT ToolKit User
Re: Value of r [#permalink]

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New post 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

Kudos [?]: 430 [0], given: 49

Manager
Manager
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Joined: 30 May 2009
Posts: 216

Kudos [?]: 132 [0], given: 0

Re: Value of r [#permalink]

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New post 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

Kudos [?]: 132 [0], given: 0

Manager
Manager
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Joined: 21 Feb 2009
Posts: 108

Kudos [?]: 96 [0], given: 4

Re: Value of r [#permalink]

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New post 03 Aug 2009, 15:13
I also marked C but GMATPREP says its E.

Kudos [?]: 96 [0], given: 4

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Senior Manager
Senior Manager
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Joined: 17 Jul 2009
Posts: 286

Kudos [?]: 44 [1], given: 9

Concentration: Nonprofit, Strategy
GPA: 3.42
WE: Engineering (Computer Hardware)
Re: Value of r [#permalink]

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New post 03 Aug 2009, 15:43
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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

Kudos [?]: 44 [1], given: 9

SVP
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Joined: 05 Jul 2006
Posts: 1750

Kudos [?]: 430 [0], given: 49

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Re: Value of r [#permalink]

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New post 03 Aug 2009, 16:05
2 silly mistakes in a row... 3 am ....i will call it a day :x

Kudos [?]: 430 [0], given: 49

Senior Manager
Senior Manager
avatar
Joined: 17 Jul 2009
Posts: 286

Kudos [?]: 44 [0], given: 9

Concentration: Nonprofit, Strategy
GPA: 3.42
WE: Engineering (Computer Hardware)
Re: Value of r [#permalink]

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


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

Kudos [?]: 44 [0], given: 9

Re: Value of r   [#permalink] 03 Aug 2009, 17:47
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If m and r are two numbers on a number line, what is the

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