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 BOING! (Posted on 2003-09-17)
I once knew a fellow who was a bit long of leg and short of foot.

The soles of his shoes were, in fact, exactly 9 inches long and his stride was exactly 35 inches. He had a habit of counting his steps when they were all on the same slab of the sidewalk and saying "Boing!" every time he stepped on a crack. If he stepped over a crack his counting started again at one, and of course his counting started at one after each "Boing!"

In his neighborhood there was a sidewalk with perfectly regular slabs all the same size. He noticed that when he walked along this sidewalk he always got the following repeating pattern (where "*" stands for "Boing!"):

121231231212312312*121231231212312312*121231....etc.

How far apart, in inches, were the cracks in the sidewalk?

 See The Solution Submitted by DJ Rating: 4.1538 (13 votes)

Comments: ( You must be logged in to post comments.)
 Subject Author Date answer K Sengupta 2010-06-06 19:34:06 ??solution?? Bry 2003-09-23 21:06:44 Solution Carleton Dunn 2003-09-21 14:55:17 re: solution(possibly) abc 2003-09-19 15:22:18 solution(possibly) brandi 2003-09-19 13:51:02 re(3): Solution abc 2003-09-18 13:00:21 re(2): Just a thought Sam 2003-09-18 11:43:35 re: Just a thought SilverKnight 2003-09-17 23:25:13 Just a thought Sam 2003-09-17 22:36:42 re(2): more thoughts (update to problem) SilverKnight 2003-09-17 18:21:36 re: more thoughts (update to problem) Brian Wainscott 2003-09-17 18:10:32 more thoughts (update to problem) SilverKnight 2003-09-17 15:38:01 re(2): Solution SilverKnight 2003-09-17 15:21:00 re: Solution abc 2003-09-17 14:31:17 Solution SilverKnight 2003-09-17 12:21:05
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