system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why Is Ten Where We Put the Zero?

I don’t even know how to explain this one really. But in numbers why do we choose to make ten double digits? And subsequently why then is 100 and all other squares of ten where we add the extra zeros/digits? Is there something special about ten itself and its powers or was it just chosen randomly?
gpt
Ten was chosen likely because we have ten fingers.

We could choose a different number to be "10", so for example binary uses two (counting up goes 0, 1, 10, 11, 100, 101 and so on). There is also hexadecimal, which uses 16 (so counting goes 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F, 10, 11 and so on). There are various different ways of counting numbers, using different *bases*, but base-ten seems to be the one we've stuck on.