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

A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.

A game for 2 or more people, based on the traditional card game Rummy. Players aim to make two `tricks', where each trick has to consist of a picture of a shape, a name that describes that shape, and. . . .

A game in which players take it in turns to try to draw quadrilaterals (or triangles) with particular properties. Is it possible to fill the game grid?

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?

Play the divisibility game to create numbers in which the first two digits make a number divisible by 2, the first three digits make a number divisible by 3...

A game in which players take it in turns to turn up two cards. If they can draw a triangle which satisfies both properties they win the pair of cards. And a few challenging questions to follow...

Charlie has made a Magic V. Can you use his example to make some more? And how about Magic Ls, Ns and Ws?

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

Move your counters through this snake of cards and see how far you can go. Are you surprised by where you end up?

Generate three random numbers to determine the side lengths of a triangle. What triangles can you draw?

Play this game to learn about adding and subtracting positive and negative numbers

Why not challenge a friend to play this transformation game?

My measurements have got all jumbled up! Swap them around and see if you can find a combination where every measurement is valid.

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

Engage in a little mathematical detective work to see if you can spot the fakes.

There are lots of different methods to find out what the shapes are worth - how many can you find?

Investigate what happens to the equations of different lines when you reflect them in one of the axes. Try to predict what will happen. Explain your findings.

These Olympic quantities have been jumbled up! Can you put them back together again?

Investigate what happens to the equation of different lines when you translate them. Try to predict what will happen. Explain your findings.

Invent a scoring system for a 'guess the weight' competition.

Can you deduce which Olympic athletics events are represented by the graphs?