Is it true that the Fibonacci numbers were derived as a solution to a puzzle about the total number of rabbits in a herd of rabbits, where the starting state of the herd is a single breeding pair? Or was that an example that Fibonacci wrote up, after the fact? Or is the whole rabbit connection apocryphal, added on by a later day math popularizer like E.T.Bell? In any case, if it is true, and you haven't already thought of it, then it is an example. (Unrelated to math-fun: Is "herd" right? It's the first term that came to my mind, but what's *really* the right term for a group of rabbits? a flock?), Sun, 23 Sep 2007 10:01:23 -0500 "Loren and Liz Larson" <lllarsson@earthlink.net> Knight tours and Hamiltonian circuits could be added to the list (traveling salesman problem, etc.) Loren ----- Original Message ----- From: "Scott Kim" <scott@scottkim.com> Sent: Sunday, September 23, 2007 1:11 AM ... The article will be about puzzles that led to new developments in math or science.