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The Rat Race

Author(s): 

Now there is a wall 5 feet thick and two rats tunnel from opposite sides.  On the first day, the big rat tunnels 1 foot and the small rat also tunnels 1 foot.  The big rat then doubles its daily rate and the small rat halves its rate.  Tell the number of days until the rats meet.

China, 100 BCE

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"The Rat Race," Loci (March 2007)

Dummy View - NOT TO BE DELETED