 This is a mathematical snack from the Association of Teachers of Mathematics. I have five butter beans here and they're sprayed gold on one side only, but you could be playing this game with coins, five coins with heads and tails. You need to make a table like this, you're going to need loads of these and this is how it goes with gold up. You shake your beans, you spill them and you see how many land gold up. One, two, three on this occasion, so I write a three, throw them again. This time I've four that have landed gold up. Oh, another three that's landed gold up, another two this time. Carry on recording my rolls like this, there's another four. I'm going to see how often this happens. Which of these is going to win our five all gold neck and neck? Which do you think is the most likely to win this race for gold up? One, that's the first time we've had one gold up, two, then neck and neck creeping ahead, another three. Is this going to be a three? What do you think the likelihood is? It is a three. So my challenge to you is to keep doing this and see if it's always the threes that win.