Welcome to Maths Is Fun

Mathsisfun.net has 2 URLs listed in 2 Dmoz categories.

Maths Is Fun
Offers a number of applications and solvers for a variety of platforms. Also offers custom puzzles.
http://www.mathsisfun.net/puzzles.htm
Top/Games/Puzzles/Brain_Teasers/Sudoku

Mathemagic
Many minor miracles for magically-minded mathematicians!
http://www.mathsisfun.net/magic.htm
Top/Science/Math/Recreations/Specific_Numbers