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Each of the short segments in the figure above is of length 1 centimet

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Joined: 02 Sep 2009
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Each of the short segments in the figure above is of length 1 centimet [#permalink]

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New post 03 Oct 2017, 23:40
00:00
A
B
C
D
E

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  35% (medium)

Question Stats:

63% (01:07) correct 38% (00:48) wrong based on 32 sessions

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Each of the short segments in the figure above is of length 1 centimeter. Travelling only on these segments, how many routes are there from A to B that are exactly 3 centimeters long?

(A) 2
(B) 4
(C) 6
(D) 8
(E) 9

[Reveal] Spoiler:
Attachment:
2017-10-04_1123.png
2017-10-04_1123.png [ 6.45 KiB | Viewed 400 times ]
[Reveal] Spoiler: OA

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Re: Each of the short segments in the figure above is of length 1 centimet [#permalink]

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New post 04 Oct 2017, 06:40
Starting from A, I can either go up, straight or down, but I won't be at B
Being at the top or at the bottom, there are two possibilities, on the outer ring or back to the middle --> 4
Being in the middle, only up or down is possible (otherwise I would end up at B within 2) --> 2
So I have to add the 4 and 2 --> 6 --> C
Re: Each of the short segments in the figure above is of length 1 centimet   [#permalink] 04 Oct 2017, 06:40
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Each of the short segments in the figure above is of length 1 centimet

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