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On her way home from work, Janet drives through several

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On her way home from work, Janet drives through several [#permalink] New post 05 Oct 2007, 23:02
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On her way home from work, Janet drives through several tollbooths. Is there a pair of these tollbooths that are less than 10 miles apart?

(1) The first tollbooth and the last tollbooth are 25 miles apart.
(2) Janet drives through 4 tollbooths on her way home from work.
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Re: DS: tollbooths [#permalink] New post 05 Oct 2007, 23:29
mexicanhoney wrote:
On her way home from work, Janet drives through several tollbooths. Is there a pair of these tollbooths that are less than 10 miles apart?

(1) The first tollbooth and the last tollbooth are 25 miles apart.
(2) Janet drives through 4 tollbooths on her way home from work.


combined suff.

C.
A...9miles...B....10miles...C...6miles...D
or can be done in different combinations
A...11miles....B...10miles...C...4miles...D

so there is at least one pair of tollbooth which are less than 10 miles apaprt from each other
Re: DS: tollbooths   [#permalink] 05 Oct 2007, 23:29
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On her way home from work, Janet drives through several

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