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Intern Joined: 15 Sep 2017
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If a,b,c and d are points on number line such that [#permalink] 00:00

Question Stats: 80% (02:25) correct 20% (01:18) wrong based on 5 sessions
If a, b, c and d are points on number line such that a < b < c < d, b is twice as far from c as from a, and c is twice as far as b is from d, then what is the value of $$\frac{c-a}{d-b}$$?

A)$$\frac{1}{3}$$

B)$$\frac{2}{3}$$

C)$$\frac{1}{2}$$

D)1

E)3

Can anyone please post solution for this.
[Reveal] Spoiler: OA
Intern Joined: 28 Aug 2018
Posts: 4
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Kudos [?]: 0 , given: 2

Re: If a,b,c and d are points on number line such that [#permalink]
Can you give us an explanation please?
Intern Joined: 07 Sep 2018
Posts: 29
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Kudos [?]: 2 , given: 5

Re: If a,b,c and d are points on number line such that [#permalink]
please post solution for this problem.
Founder  Joined: 18 Apr 2015
Posts: 8831
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Kudos [?]: 2058 , given: 8149

Re: If a,b,c and d are points on number line such that [#permalink]
Expert's post
Actually, the question says tha

a=1

b=2

c=4

d=5

b is twice as far from c as from a, and c is twice as far as b

The stem repeats the same thing twice. B and c are two units apart.

$$\frac{4-1}{5-2}=\frac{3}{3}=1$$

D
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GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests. Intern Joined: 19 Mar 2018
Posts: 25
Followers: 1

Kudos [?]: 9  , given: 11

Re: If a,b,c and d are points on number line such that [#permalink]
1
KUDOS
Took 2 approaches. I put a on left of zero and then right of zero
Left of zero:
a = -1, b = 0, c = 2, d =3
--> 2+1/3-0 = 3/3 =1

rightof zero:
a =0, b =1, c =3, d = 4 Re: If a,b,c and d are points on number line such that   [#permalink] 13 Sep 2018, 01:33
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