I invented this game in 1986 to illustrate the expression "juggling numbers". This version of the game is written in JavaScript and is debugged in the Internet Explorer in Windows. It might not work on other platforms. Contact me if you wish to have a Java version of the game.

JUGGLING NUMBERS

• The game consists of transforming a five-digit integer number with simple arithmetical operations.
• The game starts with the number 99992.
• At each move, you can add 8 to any one digit of this number, i.e. you add 8 or 80 or 800 or 8000 or 80000 to the number. You indicate which digit by clicking on this digit.
• At the same time, the computer subtracts 11111 from the number.
• For example, if you have chosen to add 8 to the fourth digit of the number 99992, the result of the move will be 99992 + 80 - 11111 = 88961.
• If the result of these calculations has more than five digits, only the last five digits are kept. For example, if you have chosen to add 8 to the first digit of the number 99992, the result of the move will be 99992 + 80000 - 11111 = 168881 and, after truncating the leading 1, 68881.
• When any of the five digits becomes 0, the game ends. Therefore, you should keep all digits of the number not equal to 0 for as many moves as possible.

 Here are two variants of the game:

1. You  play in order to survive for as many moves as you can.

2. The advanced game! You play in order to get the highest score. You score a point each time that you click on a digit equal to 1.