Whether you realize it or not, every time you say, write, or type a multi-digit number, you're *really* expressing a sum of numbers. For example, $``285"$ means $200 + 80 + 5,$ or $2 \times 10^2 + 8 \times 10^1 + 5 \times 10^0.$

Computers, however, have a different native language of number where they express everything in just ones and zeroes.

To see how these numbers work, keep reading. If you think you already know how binary numbers work, feel free to skip ahead to the challenge.