Math Puzzles
Posted in mathematics, tagged mathematics, puzzles on December 31, 2007 | 7 Comments »
I’ve returned from my conference equipped with a few new ideas, and three interesting mathematical puzzles:
Show that, in any community of finitely many people, at least two people have the same number of friends. (Assume that no one is friend of himself.)
In a certain park, there are some trees, and in those trees are [...]
