### Music to My Ears

Can you predict when you'll be clapping and when you'll be clicking if you start this rhythm? How about when a friend begins a new rhythm at the same time?

### Play a Merry Tune

Explore the different tunes you can make with these five gourds. What are the similarities and differences between the two tunes you are given?

# Beat the Drum Beat!

##### Stage: 2 Challenge Level:

Ben from Victoria College, Jersey sent this solution to the first part of the problem:

For a steady drum beat there are four possible ways: 1, 2, 3 or 6 drums equally spaced.

That's a very clear way of describing it, Ben, thank you.

For the second part of the problem, some of you may have worked out that a rhythm will sound the same forwards as backwards only if you arrange the drums symmetrically. There are only two ways of placing 3 drums symmetrically on 6 points:

Try these out on the interactive so that you are sure that they work both ways. With four drums there also two arrangements which will work both backwards and forwards:

Finally with 5 drums, there is only one rhythm that you can make, as moving the drums around just creates the same sequence with only one empty space. However this arrangement is symmetrical so it does sound the same forwards as backwards: