The other day, I got an idea. I would like to generate a random number between $1$ and $100$ , however by hand. You often want to use these random numbers to play games or even for practical purposes.
And only using simple tools like a desk clock and pen and paper.
What might be a reliable way to do this?
Take your paper and cut it into $100$ smaller (equal sized) pieces. Write each of the numbers $1$ through $100$ on the pieces. Then mix up the pieces and pick one at random.
If you don't want to do $100$ slips, use $10$ slips, labelled $0,1,...,9$. Pick twice with replacement for the two digits. If you get $00$, that's $100$.