Damn you maths geniuses. Trust you to spoil it for anyone who can't work it out........ me. I'm slow.

But there isn't an unbound number of places. Eventually you'd get to numbers so small you couldn't drive the difference, if you know what I mean. So Mr. Maths, I have one which will have you stumped (well maybe not. Try this:

Fill in the missing number:

10, 11, 12, 13, 14, 15, 16, 17, 20, 22, 24, 31, 100, ?????, 10000

And yes, it is possible, and it only has ONE answer (unless you are a super Mr. Maths who can find out another.)