Math Magic is a web site devoted to
original mathematical recreations. If you have a math puzzle, discovery, or observation, please email me about it. You can also send answers to the problem of the month. 
Math Magic Archive 

You can see all the best known results here.
Submit your answers here.
Weekly Puzzle Sites:   Ken Duisenberg  NPR  Puzzability  The Griddle  Puzzle Picnic  Nick's  
Other Puzzle Sites:   MathPuzzle.com  IBM  Retrograde Analysis  Puzzle Palace  Terry Stickels  
Interactive Puzzle Sites:   Click Mazes  Puzzle Beast  Logic Mazes  Color Shift  Grid 1  2  Boomshine  
PhysicsBased Puzzle Sites:  
Perfect Balance 1 
2 
Assembler 1 
2 
3 
4   Color Infection  Redstar Fall 1  2  Fantastic Contraption  
Colleges with Puzzles:   Macalester  Missouri State  Purdue  
Great Math Sites:   Geometry Junkyard 
Math World 
Mathematician Biographies 
 Integer Sequences  Inverse Calculator  Geometric Dissections  
Recreational Math Sites:   Mike Keith 
Harvey Heinz 
Primes 
GIMPS 
 Polyforms  World of Numbers  Soup Kitchen  