Algodoo

0,1,2,3,4,5,6,7,8,9 is 10 options
deci = ten. we use the decimal system
123 = 3+ 20 +100 = 1x10^2 + 2x10^1 +3x10^0

0,1 is 2 options
bi = two. we can use the binary system
1011 = 1*2^0 + 1*2^1 + 0*2^2 + 1*2^3 = 1+2+4 = 7

This scene shows how to use a system of logic gates to create binary addition. logic gates provided by conundrumer.

-There are 10 kinds of people in this world, those who understand binary and those who don't.