Use the three triangles to fill these outline shapes. Perhaps you can create some of your own shapes for a friend to fill?

Using different numbers of sticks, how many different triangles are you able to make? Can you make any rules about the numbers of sticks that make the most triangles?

In how many ways can you fit two of these yellow triangles together? Can you predict the number of ways two blue triangles can be fitted together?

You have a set of the digits from 0 – 9. Can you arrange these in the five boxes to make two-digit numbers as close to the targets as possible?

Can you make the most extraordinary, the most amazing, the most unusual patterns/designs from these triangles which are made in a special way?

Explore the triangles that can be made with seven sticks of the same length.

Kate has eight multilink cubes. She has two red ones, two yellow, two green and two blue. She wants to fit them together to make a cube so that each colour shows on each face just once.

Follow these instructions to make a three-piece and/or seven-piece tangram.

Make a mobius band and investigate its properties.

Surprise your friends with this magic square trick.

Have you noticed that triangles are used in manmade structures? Perhaps there is a good reason for this? 'Test a Triangle' and see how rigid triangles are.

Have a go at making a few of these shapes from paper in different sizes. What patterns can you create?

Make a chair and table out of interlocking cubes, making sure that the chair fits under the table!

Arrange 9 red cubes, 9 blue cubes and 9 yellow cubes into a large 3 by 3 cube. No row or column of cubes must contain two cubes of the same colour.

The ancient Egyptians were said to make right-angled triangles using a rope with twelve equal sections divided by knots. What other triangles could you make if you had a rope like this?

These pictures show squares split into halves. Can you find other ways?

Can you work out what shape is made when this piece of paper is folded up using the crease pattern shown?

Using these kite and dart templates, you could try to recreate part of Penrose's famous tessellation or design one yourself.

Can you split each of the shapes below in half so that the two parts are exactly the same?

Make a flower design using the same shape made out of different sizes of paper.

Follow the diagrams to make this patchwork piece, based on an octagon in a square.

Kaia is sure that her father has worn a particular tie twice a week in at least five of the last ten weeks, but her father disagrees. Who do you think is right?

Can you see which tile is the odd one out in this design? Using the basic tile, can you make a repeating pattern to decorate our wall?

This practical problem challenges you to create shapes and patterns with two different types of triangle. You could even try overlapping them.

Have a go at drawing these stars which use six points drawn around a circle. Perhaps you can create your own designs?

This problem focuses on Dienes' Logiblocs. What is the same and what is different about these pairs of shapes? Can you describe the shapes in the picture?

Take 5 cubes of one colour and 2 of another colour. How many different ways can you join them if the 5 must touch the table and the 2 must not touch the table?

NRICH December 2006 advent calendar - a new tangram for each day in the run-up to Christmas.

Ideas for practical ways of representing data such as Venn and Carroll diagrams.

It's hard to make a snowflake with six perfect lines of symmetry, but it's fun to try!

Did you know mazes tell stories? Find out more about mazes and make one of your own.

Our 2008 Advent Calendar has a 'Making Maths' activity for every day in the run-up to Christmas.

Can you work out what shape is made by folding in this way? Why not create some patterns using this shape but in different sizes?

We can cut a small triangle off the corner of a square and then fit the two pieces together. Can you work out how these shapes are made from the two pieces?

What do these two triangles have in common? How are they related?

Follow these instructions to make a five-pointed snowflake from a square of paper.

Make a cube with three strips of paper. Colour three faces or use the numbers 1 to 6 to make a die.

Cut a square of paper into three pieces as shown. Now,can you use the 3 pieces to make a large triangle, a parallelogram and the square again?

Can you make a rectangle with just 2 dominoes? What about 3, 4, 5, 6, 7...?

Arrange your fences to make the largest rectangular space you can. Try with four fences, then five, then six etc.

Using a loop of string stretched around three of your fingers, what different triangles can you make? Draw them and sort them into groups.

Here are some ideas to try in the classroom for using counters to investigate number patterns.

Have you ever tried tessellating capital letters? Have a look at these examples and then try some for yourself.

For this activity which explores capacity, you will need to collect some bottles and jars.

In this activity focusing on capacity, you will need a collection of different jars and bottles.

Can you describe a piece of paper clearly enough for your partner to know which piece it is?

Can you make five differently sized squares from the tangram pieces?