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Points a, b, c, d are all on a number line and d > a. If b is twice as

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Joined: 02 Sep 2009
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Points a, b, c, d are all on a number line and d > a. If b is twice as  [#permalink]

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New post 18 Sep 2018, 22:16
00:00
A
B
C
D
E

Difficulty:

  95% (hard)

Question Stats:

20% (04:01) correct 80% (02:57) wrong based on 42 sessions

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B
Joined: 06 Aug 2017
Posts: 85
GMAT 1: 570 Q50 V18
GMAT 2: 610 Q49 V24
GMAT 3: 640 Q48 V29
Re: Points a, b, c, d are all on a number line and d > a. If b is twice as  [#permalink]

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New post 18 Sep 2018, 22:57
1
Bunuel wrote:
Points a, b, c, d are all on a number line and d > a. If b is twice as far from d as it is from a and c is twice as far from a as it is from d, then (c - b)/(d - a) could equal all of the following answer choices EXCEPT?


A. -1
B. 1/3
C. 1
D. 2
E. 3


IMO A

As shown in the diagram below b,b' and c,c' can be different positions of b and c.

As shown (c-b), (c-b'), (c'-b) or (c'-b') will always be +ve
Given d>a
So (c-b) or (c-b') or (c'-b) or (c'-b')/(d-a) is always +ve

Only option A has -ve value, hence answer is A
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Joined: 17 Jun 2018
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Re: Points a, b, c, d are all on a number line and d > a. If b is twice as  [#permalink]

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New post 11 Jan 2019, 11:23
Bunuel chetan2u can you explain this one?

Thanks
GMAT Club Bot
Re: Points a, b, c, d are all on a number line and d > a. If b is twice as   [#permalink] 11 Jan 2019, 11:23
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Points a, b, c, d are all on a number line and d > a. If b is twice as

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