Challenge Level

A game in which players take it in turns to choose a number. Can you block your opponent?

Challenge Level

Collect as many diamonds as you can by drawing three straight lines.

Challenge Level

Here is a machine with four coloured lights. Can you develop a strategy to work out the rules controlling each light?

Challenge Level

Can you use small coloured cubes to make a 3 by 3 by 3 cube so that each face of the bigger cube contains one of each colour?

Challenge Level

Can you find the hidden factors which multiply together to produce each quadratic expression?

Challenge Level

Can you work out which spinners were used to generate the frequency charts?