Cisco’s Binary Game is a fun way to learn how to use the binary number system. In this game, the player has to convert base 10 numbers back to binary and vice versa.
What is Binary?
The binary numeral system, or base-2 number system represents numeric values using two symbols, usually 0 and 1. More specifically, the usual base-2 system is a positional notation with a radix of 2. Owing to its straightforward implementation in digital electronic circuitry using logic gates, the binary system is used internally by all modern computers.
http://en.wikipedia.org/wiki/Binary_numeral_system
