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rao
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DS Geometery.JPG 21 Sep 2008, 18:38
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Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

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Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 2 sessions

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DS Geometery.JPG



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UMB
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DS Geometery.JPG 22 Sep 2008, 00:59
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C.
st1) doesn't give any info about r. r can any + or - #. Insuff.
st2) at least 2 options are possible: r=-s or r,s,t are all negative #s. Insuff.

1+2 st) r=-s and 0 is between r and s.
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DS Geometery.JPG 22 Sep 2008, 01:16
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IMO B.

From II, t-r = t - (-s) or -r = s....hence sufficient.
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DS Geometery.JPG 26 Sep 2008, 21:42
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OA is C ... still confused ...
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x2suresh
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DS Geometery.JPG 27 Sep 2008, 00:13
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rao_1857
OA is C ... still confused ...
Show more

should be C..


B is not the answer two possibilities.

Graphical approach:
See below for graphical approach.
s and t are positive-- in this case s=-r
<-----r----0---s-----t-->
s and t are -ve ... inthis case s<>-r (zero is not mid point)
<-----r----s----t----0-(-s)--->

Mathematical approach:

When we talk about distance.. don't forget Mod..

|t-r|=|t+s|
--> multiple solutions

when you combine (1) and (2)
t and s are +ve .
r=-s
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DS Geometery.JPG 28 Sep 2008, 05:32
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x2suresh
rao_1857
OA is C ... still confused ...

should be C..


B is not the answer two possibilities.

Graphical approach:
See below for graphical approach.
s and t are positive-- in this case s=-r
<-----r----0---s-----t-->
s and t are -ve ... inthis case s<>-r (zero is not mid point)
<-----r----s----t----0-(-s)--->

Mathematical approach:

When we talk about distance.. don't forget Mod..

|t-r|=|t+s|
--> multiple solutions

when you combine (1) and (2)
t and s are +ve .
r=-s
Show more

Good catch. Graph made everything crystal clear.
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rao
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DS Geometery.JPG 02 Oct 2008, 06:53
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x2suresh
rao_1857
OA is C ... still confused ...

should be C..


B is not the answer two possibilities.

Graphical approach:
See below for graphical approach.
s and t are positive-- in this case s=-r
<-----r----0---s-----t-->
s and t are -ve ... inthis case s<>-r (zero is not mid point)
<-----r----s----t----0-(-s)--->

Mathematical approach:

When we talk about distance.. don't forget Mod..

|t-r|=|t+s|
--> multiple solutions

when you combine (1) and (2)
t and s are +ve .
r=-s
Show more

thnaks .. +1 for clariying it clearly ....
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DS Geometery.JPG 02 Oct 2008, 23:26
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I liked the mathematical approach



Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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