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

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Manager
Joined: 14 Nov 2005
Posts: 67
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Kudos [?]: 0 [0], given: 0

If m and r are two numbers on a number line, what is the [#permalink]  30 Jan 2006, 22:45
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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 a halfway between m and r
Manager
Joined: 15 Aug 2005
Posts: 199
Location: New York
Followers: 1

Kudos [?]: 1 [0], given: 0

C too

The distance from 0 to m is 6, while the distance from 0 to r is 18.
VP
Joined: 20 Sep 2005
Posts: 1023
Followers: 3

Kudos [?]: 27 [0], given: 0

I selected E after 2 minutes.
Yurik, can you pls explain your choice.
VP
Joined: 20 Sep 2005
Posts: 1023
Followers: 3

Kudos [?]: 27 [0], given: 0

How about m = -12, r = 36. Midpoint is 12. Distance of r from 0 = 36 and distance of m from 0 is 12.
Manager
Joined: 15 Aug 2005
Posts: 199
Location: New York
Followers: 1

Kudos [?]: 1 [0], given: 0

lhotseface wrote:

How about m = -12, r = 36. Midpoint is 12. Distance of r from 0 = 36 and distance of m from 0 is 12.

Ihotseface, you are correct. There are more than one example.
Director
Joined: 09 Oct 2005
Posts: 722
Followers: 3

Kudos [?]: 12 [0], given: 0

lhotseface wrote:
I selected E after 2 minutes.
Yurik, can you pls explain your choice.

I see my mistake)))E it is
1)The distance between r and 0 is 3 times the distance between m and 0
insuff since r and m can be anywhere
2)insuff 12 is a halfway between m and r
multiple values))
together the same))
agree with you E it is
_________________

IE IMBA 2010

GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5078
Location: Singapore
Followers: 22

Kudos [?]: 184 [0], given: 0

(1) Insufficient. If m is 1, then the distance is 1 and r could be 3. Similarly, if m is -1, then the distance is still 1 while r is kept at 3. But the distance between r and m will be 2 and 4 respectively.

(2) Insufficient. We do not know how m and r are equally spaced out from 12.

Using (1) and (2), we still can't tell how they are spaced out while keeping st1 satisfied.

If m = 6, r = 18, then 12 is midway between m and r, and r-m = 12

If m = -12, r = 36, then 12 is still midway between m and r and r-m=48

Ans E
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