Good joke I heard today

[Gwarsbane]

For those that don't know binary, you read binary from right to left. and you only use 1s and 0s to represent numbers.

01 = 1
10 = 2
11 = 3
100 = 4

The numbers are set up like this.
32 16 8 4 2 1

So the number 9 would look like this

0 0 1 0 0 1

The number 20 would look like this

0 1 0 1 0 0