I'd really like some help on how to work this sort of sums out. A step by step explanation would be great!
Allen is making a bead neclace using four different coloured beads. How many different ways can he arrange these four beads on the necklace?
I think the answer is 16, but I'm not sure. I worked it out by listing every possible combination - but I think there might be a formula to solve questions like this.