Binary
I read somewhere that there are 10 kinds of people. Those who understand binary and those who don't.
We have a remote controller for the outside gate. It has 10 switches, each is either up or down.
It doesn't work since I dropped it whilst changing the battery, I can only assume that one of the switches - cheap and nasty - has moved. I've tried changing each, one by one, and lost patience.
As a matter of interest, how many combiantations are there?