Number Tricks

The Digit Struck Out
The 99 Trick

Brothers and Sisters Trick
Some Number Tricks

Number Trick #2
Number Trick #4

Quick Addition
Domino Trick

Fibonacci Trick
Overhead Projector Trick

Squaring Numbers Ending in Five
Base 2 Trick

Calendar Trick #1
Calendar Trick #2

The Printing Press Number
Addition Trick with Whole Numbers

The 1979 Trick
MacArthur's Favorite Number Game, Version 2

Subtraction Trick
The 17 Trick

Multiplication Trick
Birthday Trick (European format)

The Digit Struck Out (Interactive version)
The 999 Trick

Division Trick
Number Trick #1

Number Trick #3
Interactive version of Number Trick #4

Addition Trick
Domino Trick (Interactive version)

Perfect Fifth Power Trick
Interactive Overhead Trick

The Dime and Penny Trick
My Nines Tables

Interactive version of Calendar Trick #1
Interactive version of Calendar Trick #2

Repeat Yourself
Addition Trick with Negative Numbers

Six Consecutive Numbers Trick
The Lucky Numbers Trick

Subtraction Trick (Interactive version)
Mathemagical Black Holes

Lewis Carroll's Number Trick
Four Digit Number Trick