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How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?

Investigate how this pattern of squares continues. You could measure lengths, areas and angles.

I am less than 25. My ones digit is twice my tens digit. My digits add up to an even number.

If we had 16 light bars which digital numbers could we make? How will you know you've found them all?

Use these head, body and leg pieces to make Robot Monsters which are different heights.

Can you use the numbers on the dice to reach your end of the number line before your partner beats you?

An old game with lots of arithmetic!

How could you arrange at least two dice in a stack so that the total of the visible spots is 18?

Can you use the clues to complete these 4 by 4 Mathematical Sudokus?

This problem looks at how one example of your choice can show something about the general structure of multiplication.