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Points A, B, C and D are on a number line not necessarily in

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Manager
Joined: 30 May 2009
Posts: 212
Points A, B, C and D are on a number line not necessarily in [#permalink]

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27 Jun 2009, 12:28
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Points A, B, C and D are on a number line not necessarily in that order. IF the distance between A and B is 18 and distance between C and D is 8, what is the distance between B and D?

(1) Distance between C and B is same as the distance between C and A.
(2) A is to the left of D on number line.

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Senior Manager
Joined: 04 Jun 2008
Posts: 285

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27 Jun 2009, 12:35
1
KUDOS
1) not sufficient, nothing mentioned about the relative directions of B and D

2) not sufficient, the relative distances of the 2 pairs of points are not mentioned.

combining, not sufficient.

after combining we know that C is in between A and B, at a distance of 9 from both, so D too should be between A and B as it is only 8 units away from C
but direction of D relative to C and B is not mentioned, so it could be on either side of C.

ans is E
Manager
Joined: 30 May 2009
Posts: 212

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27 Jun 2009, 12:39
It is indeed E.

I dont know how I could screw up such a simple one. I am so mad at myself...
Senior Manager
Joined: 04 Jun 2008
Posts: 285

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27 Jun 2009, 12:51
happened with me too when i solved this one for the first time

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: Distance between points   [#permalink] 27 Jun 2009, 12:51
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