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# Points A, B, C and D are on the number line, not necessarily

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Points A, B, C and D are on the number line, not necessarily [#permalink]  27 Mar 2009, 10:25
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62% (01:58) correct 37% (00:26) wrong based on 16 sessions
Points A, B, C and D are on the number line, not necessarily in that order. If the distance between A and B is 18 and the distance between C& D is 8, what is the distance between B & D

1) Distance between C & A is same as distance between C & B.
2) A is to the left of the line.
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Schools: Yale SOM, Tuck, Ross, IESE, HEC, Johnson, Booth
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Re: DS GMAT points on number line [#permalink]  27 Mar 2009, 14:50
Accountant wrote:
Points A, B, C and D are on the number line, not necessarily in that order. If the distance between A and B is 18 and the distance between C& D is 8, what is the distance between C & D

1) Distance between C & A is same as distance between C & B.
2) A is to the left of the line.

Accountant, you have given the answer in the question itself, isn't it?
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Re: DS GMAT points on number line [#permalink]  27 Mar 2009, 17:31
Sorry about that, question requires distance between B & D.

Points A, B, C and D are on the number line, not necessarily in that order. If the distance between A and B is 18 and the distance between C& D is 8, what is the distance between B & D

1) Distance between C & A is same as distance between C & B.
2) A is to the left of the line.
Senior Manager
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Re: DS GMAT points on number line [#permalink]  27 Mar 2009, 18:14
Accountant wrote:
Sorry about that, question requires distance between B & D.

Points A, B, C and D are on the number line, not necessarily in that order. If the distance between A and B is 18 and the distance between C& D is 8, what is the distance between B & D

1) Distance between C & A is same as distance between C & B.
2) A is to the left of the line.

What does it mean: "A is to the left of the line"? Does the stmnt 2 read correctly? I think something is missing there.
Anyhow, I think that depending on what is missing in the statement, the answer is likely C, and BD is either 1 or 17.
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Re: DS GMAT points on number line [#permalink]  27 Mar 2009, 21:19
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Answer is E.

Stmt 1: Tell us that the C lies in the center between A and B. Nothing about direction of A or B or if D is to the left or
right of C. Insufficient.
Stmt 2: A is to the left of the line i.e left of B. Insufficient.

Combine: Tell us where all the point lies but does not tell that if D it to the left or right so Insufficient.
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Re: DS GMAT points on number line [#permalink]  28 Mar 2009, 00:15
From statement 1, C is in between A and B - so it could be that C is 9 from A and C is 9 from B. It already says that between C and D it is 8 - but it doesn't say where D is - so we can't get the distance between D and B.

From statement 2, A is to the left of B - thats all the information. So it is insufficient.

We are down to C and E. When we take it together - again we don't know where D is - so we can't find B and D distance - so insufficient.

Answer is E.

What is OA?
Manager
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Re: DS GMAT points on number line [#permalink]  28 Mar 2009, 03:21
Sorry, I really messed this up while typing. A is to the left of D on the number line.

Points A, B, C and D are on the number line, not necessarily in that order. If the distance between A and B is 18 and the distance between C& D is 8, what is the distance between C & D

1) Distance between C & A is same as distance between C & B.
2) A is to the left of D on the number line.
Manager
Joined: 19 Oct 2008
Posts: 96
Followers: 1

Kudos [?]: 1 [0], given: 0

Re: DS GMAT points on number line [#permalink]  28 Mar 2009, 03:46
Well, I did it again. Apparently I can't type. I sincerly apologize.

Points A, B, C and D are on the number line, not necessarily in that order. If the distance between A and B is 18 and the distance between C& D is 8, what is the distance between B & D

1) Distance between C & A is same as distance between C & B.
2) A is to the left of D on the number line.
Manager
Joined: 19 May 2008
Posts: 165
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Re: DS GMAT points on number line [#permalink]  28 Mar 2009, 06:34
Well doesn't the answer still remain E
A is left of D could mean either D is left of C or right of C - if it is right of C, distance between B and D is 1, if it is left of C, it would be 17.

Correct me, if I am wrong.
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Re: DS GMAT points on number line [#permalink]  30 Mar 2011, 22:37
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The answer is E, this line illustrates that :

--------A--D-----C----D--B------------------------------
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Re: DS GMAT points on number line   [#permalink] 30 Mar 2011, 22:37
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# Points A, B, C and D are on the number line, not necessarily

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