You may also like

problem icon

Babylon Numbers

Can you make a hypothesis to explain these ancient numbers?

problem icon

Ishango Bone

Can you decode the mysterious markings on this ancient bone tool?

problem icon

Pattern Recognition

When does a pattern start to exhibit structure? Can you crack the code used by the computer?

Black Box

Stage: 5 Challenge Level: Challenge Level:3 Challenge Level:3 Challenge Level:3

What does this black box do?

If you can see this message Flash may not be working in your browser
Please see http://nrich.maths.org/techhelp/#flash to enable it.