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Usenet Newsgroups : rec.puzzles Hall of Fame


The rec.puzzles Hall of Fame is a compilation of over 500 of the most popular puzzles that have been posted and discussed in the rec.puzzles newsgroup. In most cases a detailed solution has been provided.

Many of these puzzles also appear in Braingle's own collection.

   
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Categories : geometry : walk.p

A person walks up a hill starting at 8 pm and arrives at the top at midnight.
The next day the same person walks down the hill following the same path, again
starting at 8 pm and arriving at midnight.  Is there necessarily a point on
the path where the person is at the same time on both days? 


Solution


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