Date: Fri, 1 Jul 2005 01:44:53 +0000
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Q: Three ants are at different corners of a triangle.  They start walking
down an edge at the same time.  What are the odds they will not run into
each other before they reach the next corner?

A: Each ant has two ways to go, so there are 2^3 = 8 possible ways they
can walk.  They will not run into one another if they all go clockwise
or counterclockwise, so there are two ways they can avoid each other.
The odds are 2 : 8 or 1 : 4.