Math Links

[Math_] Links to websites with interesting math problems.

www.cut-the-knot.org

Interactive math miscellany and puzzles. Definitely the best.

rec.puzzles

The rec.puzzles newsgroup has an archive and an FAQ page
which contain a wealth of information about many interesting problems.

sci.math

This is the FAQ page for the sci.math newsgroup which
is another place you can search for answers.

Shack's math problems

This is a similar page that contains
interesting math problems.

IMO

This is the
Canadian site for International Mathematical Olympiad which is a
yearly competition for high school students.

Chance

This is a course developed at Dartmouth aiming to make students more informed, critical readers of current news stories that use probability and statistics.

Geopuzzles

This is a database of geometry problems.

Heard on the Street

This is a collection of questions asked in Wall Street job interviews.