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On the number line, if r<s, if p is halfway between r and s,

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On the number line, if r<s, if p is halfway between r and s, [#permalink]

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On the number line, if r<s, if p is halfway between r and s, and if t is halfway between p and r then (s-t)/(t-r)=

A. 1/4
B. 1/3
C. 4/3
D. 3
E. 4
[Reveal] Spoiler: OA

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Last edited by Baten80 on 17 Feb 2011, 08:59, edited 1 time in total.

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Re: Alegebra expression [#permalink]

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New post 17 Feb 2011, 08:29
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Baten80 wrote:
On the number line, if r<S, if p is the halfway between r and s, and if t is the halfway between p and r, then s-t/t-r=

What i will the s-t either s minus t or s to t. please help.
1/4
1/3
4/3
3
4


PLEASE FORMAT THE QUESTIONS PROPERLY!

Also what do you mean by "What i will the s-t either s minus t or s to t"?

Original question is:

On the number line, if r<s, if p is halfway between r and s, and if t is halfway between p and r then (s-t)/(t-r)=
A. 1/4
B. 1/3
C. 4/3
D. 3
E. 4

Let r=0 and s=4 --> p is halfway between r and s: p=2;
t is halfway between p=2 and r=0: t=1;

(s-t)/(t-r)=(4-1)/(1-0)=3.

Answer: D.

P.S. On the GMAT we can often see such statement: \(k\) is halfway between \(m\) and \(n\) on the number line. Remember this statement can ALWAYS be expressed algebraically as: \(\frac{m+n}{2}=k\).
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Kudos [?]: 135492 [1], given: 12696

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Re: Alegebra expression [#permalink]

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New post 17 Feb 2011, 09:01
What i will READ the s-t either s minus t or s to t. please help.
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Collections:-
PSof OG solved by GC members: http://gmatclub.com/forum/collection-ps-with-solution-from-gmatclub-110005.html
DS of OG solved by GC members: http://gmatclub.com/forum/collection-ds-with-solution-from-gmatclub-110004.html
100 GMAT PREP Quantitative collection http://gmatclub.com/forum/gmat-prep-problem-collections-114358.html
Collections of work/rate problems with solutions http://gmatclub.com/forum/collections-of-work-rate-problem-with-solutions-118919.html
Mixture problems in a file with best solutions: http://gmatclub.com/forum/mixture-problems-with-best-and-easy-solutions-all-together-124644.html

Kudos [?]: 1168 [0], given: 39

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Joined: 02 Sep 2009
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Re: Alegebra expression [#permalink]

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New post 17 Feb 2011, 09:05

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Re: On the number line, if r<s, if p is halfway between r and s, [#permalink]

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Re: On the number line, if r<s, if p is halfway between r and s,   [#permalink] 02 Nov 2015, 00:48
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