Math Tricks

Number and Computational Tricks   Card Tricks
Judge Handley Mindreading Trick   One of Einstein's Favorite Puzzles
General MacArthur's Favorite Number Game   Interactive version of MacArthur's Trick
Wrecked Angle -- Extra Square Inch   Math Magic Tricks by Martin Gardner
Abbott and Costello's trick: 7x13=28   Finger Multiplication
Mobius Strip   Mobius Card -- An Impossible Shape!
Phone Number Trick   Mathemagical Black Holes
The Dictionary Trick   The Hole in the Paper Trick
100 Pennies Trick   Toilet Paper Tube Tricks by Martin Gardner
Tearing Paper in Half   Salary Problem
Your Age by Eating Out   Your Age by Chocolate
Pepper Problem (the missing dollar)   The Bellman Problem (the missing dollar)
Psychological Forces   Cow Problem
Twenty Objects Trick   Interactive version of Twenty Objects
What's Your Favorite Class?   Optical Illusions
Guess a Birthday   Interactive version of Guess A Birthday
Snapping Your Fingers   Roman Numeral Trick
Money is Irrational   Guess the Month
Best Year of Your Life   April Fool's Trick