Add or subtract the two numbers on the spinners and try to complete a row of three. Are there some numbers that are good to aim for?

Can you find a reliable strategy for choosing coordinates that will locate the treasure in the minimum number of guesses?

Nicola has lost a piece of her 3D jigsaw. Can you work out the shape of the missing piece?

In this game the winner is the first to complete a row of three. Are some squares easier to land on than others?

Can you rearrange the cards to make a series of correct mathematical statements?

Some treasure has been hidden in a three-dimensional grid! Can you work out a strategy to find it as efficiently as possible?

Can you find a way to turn a rectangle into a square?

I added together some of my neighbours' house numbers. Can you explain the patterns I noticed?

The Number Jumbler can always work out your chosen symbol. Can you work out how?

Think of a number and follow the machine's instructions... I know what your number is! Can you explain how I know?

Think of a number and follow my instructions. Tell me your answer, and I'll tell you what you started with! Can you explain how I know?

Take a look at the video and try to find a sequence of moves that will untangle the ropes.

It would be nice to have a strategy for disentangling any tangled ropes...