Interactive Mathematics Miscellany and Puzzles
http://www.cut-the-knot.org/content.shtml
Many people have “math anxiety”. Alexander Bogomolny, a former Associate Professor of Mathematics at the University of Iowa turned software developer wanted to “create a resource that would help people learn, if not math itself, then, at least, ways to appreciate its beauty.”
At Interactive Mathematics Miscellany and Puzzles find games and puzzles, arithmetic and algebra problems, geometry proofs, information about math as a language, and more.



