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If m and r are two numbers on th enumber line, what is the

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

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New post 26 Jan 2009, 09:32
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E

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If m and r are two numbers on th enumber 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

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Re: DS - Lines  [#permalink]

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New post 26 Jan 2009, 11:56
1. Let's say two conditions are true: we have m and r on the line in following order - m.....12.....r
2. Now let's move m and r from 12 increasing distance between m,r and 12: <--- m.....12.....r --->
3. Firstly we pass following configuration: 0....(m=6)....12....(r=18) that satisfied both conditions.
4. Secondly we pass another configuration: (m=-12)....0....12....24....(r=36) that also satisfied both conditions.

Therefore, E.
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Re: DS - Lines  [#permalink]

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New post 26 Jan 2009, 13:27
study wrote:
If m and r are two numbers on th enumber 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


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Re: DS - Lines  [#permalink]

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New post Updated on: 27 Jan 2009, 09:07
Given absolute value of R = 3 times absolute value of M.
stmt1. R , M both or either could be negative or positive
so Not sufficient

stmt2. 12 is half way between R and M ..which implies the same
R and M could have any value.
so Not sufficient.

Both stmts together also gives different values of R and M

So the answer is E.

Originally posted by graduateprofessor on 27 Jan 2009, 08:46.
Last edited by Praetorian on 27 Jan 2009, 09:07, edited 1 time in total.
edited to remove link
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Re: DS - Lines  [#permalink]

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New post 27 Jan 2009, 09:50
study wrote:
If m and r are two numbers on th enumber 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


S1: Could be 1,3 or 3,9.

S2: No help here at all. 10, 14, or 6, 18.


Together: still not enough. m could be 6 and r 18. or -12, and 36.


E

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Re: DS - Lines &nbs [#permalink] 27 Jan 2009, 09:50
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