Time for a little mathemagic! Choose any five cards from a pack and show four of them to your partner. How can they work out the fifth?

It might seem impossible but it is possible. How can you cut a playing card to make a hole big enough to walk through?

Make an equilateral triangle by folding paper and use it to make patterns of your own.

You could use just coloured pencils and paper to create this design, but it will be more eye-catching if you can get hold of hammer, nails and string.

A game to make and play based on the number line.

Galileo, a famous inventor who lived about 400 years ago, came up with an idea similar to this for making a time measuring instrument. Can you turn your pendulum into an accurate minute timer?

Logo helps us to understand gradients of lines and why Muggles Magic is not magic but mathematics. See the problem Muggles magic.

In this article for teachers, Bernard uses some problems to suggest that once a numerical pattern has been spotted from a practical starting point, going back to the practical can help explain. . . .

Make your own double-sided magic square. But can you complete both sides once you've made the pieces?

Make a clinometer and use it to help you estimate the heights of tall objects.

These models have appeared around the Centre for Mathematical Sciences. Perhaps you would like to try to make some similar models of your own.

As part of Liverpool08 European Capital of Culture there were a huge number of events and displays. One of the art installations was called "Turning the Place Over". Can you find our how it works?

Exploring balance and centres of mass can be great fun. The resulting structures can seem impossible. Here are some images to encourage you to experiment with non-breakable objects of your own.

Use the tangram pieces to make our pictures, or to design some of your own!

What happens when a procedure calls itself?

More Logo for beginners. Now learn more about the REPEAT command.

Here is a chance to create some Celtic knots and explore the mathematics behind them.

Interior angles can help us to work out which polygons will tessellate. Can we use similar ideas to predict which polygons combine to create semi-regular solids?

This article for pupils gives an introduction to Celtic knotwork patterns and a feel for how you can draw them.

Can you puzzle out what sequences these Logo programs will give? Then write your own Logo programs to generate sequences.

Write a Logo program, putting in variables, and see the effect when you change the variables.

Learn about Pen Up and Pen Down in Logo

Learn how to draw circles using Logo. Wait a minute! Are they really circles? If not what are they?

This part introduces the use of Logo for number work. Learn how to use Logo to generate sequences of numbers.

Turn through bigger angles and draw stars with Logo.

How many differently shaped rectangles can you build using these equilateral and isosceles triangles? Can you make a square?

Learn to write procedures and build them into Logo programs. Learn to use variables.

More Logo for beginners. Learn to calculate exterior angles and draw regular polygons using procedures and variables.

Draw whirling squares and see how Fibonacci sequences and golden rectangles are connected.

Make some celtic knot patterns using tiling techniques

This is the second in a twelve part introduction to Logo for beginners. In this part you learn to draw polygons.

This article for students gives some instructions about how to make some different braids.

This package contains hands-on code breaking activities based on the Enigma Schools Project. Suitable for Stages 2, 3 and 4.

Delight your friends with this cunning trick! Can you explain how it works?

A description of how to make the five Platonic solids out of paper.

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?

Design and construct a prototype intercooler which will satisfy agreed quality control constraints.

Build a scaffold out of drinking-straws to support a cup of water

Starting with four different triangles, imagine you have an unlimited number of each type. How many different tetrahedra can you make? Convince us you have found them all.

The Tower of Hanoi is an ancient mathematical challenge. Working on the building blocks may help you to explain the patterns you notice.

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

A challenge that requires you to apply your knowledge of the properties of numbers. Can you fill all the squares on the board?

What shape and size of drinks mat is best for flipping and catching?

Here is a solitaire type environment for you to experiment with. Which targets can you reach?

I start with a red, a blue, a green and a yellow marble. I can trade any of my marbles for three others, one of each colour. Can I end up with exactly two marbles of each colour?

Use the interactivity to listen to the bells ringing a pattern. Now it's your turn! Play one of the bells yourself. How do you know when it is your turn to ring?