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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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If m and r are two numbers on a number line, what is the [#permalink] New post 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
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 [#permalink] New post 30 Jan 2006, 23:00
C too

The distance from 0 to m is 6, while the distance from 0 to r is 18.
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 [#permalink] New post 30 Jan 2006, 23:01
I selected E after 2 minutes.
Yurik, can you pls explain your choice.
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 [#permalink] New post 30 Jan 2006, 23:08
E is my answer.

How about m = -12, r = 36. Midpoint is 12. Distance of r from 0 = 36 and distance of m from 0 is 12.
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 [#permalink] New post 30 Jan 2006, 23:14
lhotseface wrote:
E is my answer.

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.
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 [#permalink] New post 30 Jan 2006, 23:18
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
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 [#permalink] New post 31 Jan 2006, 04:31
(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
  [#permalink] 31 Jan 2006, 04:31
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