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.
These practical challenges are all about making a 'tray' and covering it with paper.
What is the smallest cuboid that you can put in this box so that you cannot fit another that's the same into it?
Take a rectangle of paper and fold it in half, and half again, to make four smaller rectangles. How many different ways can you fold it up?
What is the greatest number of counters you can place on the grid below without four of them lying at the corners of a square?
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?
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?
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?
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.
Here is a version of the game 'Happy Families' for you to make and play.
Make your own double-sided magic square. But can you complete both sides once you've made the pieces?
How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?
What happens to the area of a square if you double the length of the sides? Try the same thing with rectangles, diamonds and other shapes. How do the four smaller ones fit into the larger one?
Let's say you can only use two different lengths - 2 units and 4 units. Using just these 2 lengths as the edges how many different cuboids can you make?
In this article for primary teachers, Fran describes her passion for paper folding as a springboard for mathematics.
Can you make the most extraordinary, the most amazing, the most unusual patterns/designs from these triangles which are made in a special way?
How many triangles can you make on the 3 by 3 pegboard?
These squares have been made from Cuisenaire rods. Can you describe the pattern? What would the next square look like?
Are all the possible combinations of two shapes included in this set of 27 cards? How do you know?
Can you make dice stairs using the rules stated? How do you know you have all the possible stairs?
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?
In this challenge, you will work in a group to investigate circular fences enclosing trees that are planted in square or triangular arrangements.
Make new patterns from simple turning instructions. You can have a go using pencil and paper or with a floor robot.
What is the largest number of circles we can fit into the frame without them overlapping? How do you know? What will happen if you try the other shapes?
How many models can you find which obey these rules?
Can you make the birds from the egg tangram?
Investigate the smallest number of moves it takes to turn these mats upside-down if you can only turn exactly three at a time.
How can you arrange the 5 cubes so that you need the smallest number of Brush Loads of paint to cover them? Try with other numbers of cubes as well.
Take a counter and surround it by a ring of other counters that MUST touch two others. How many are needed?
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?
Delight your friends with this cunning trick! Can you explain how it works?
Here are some ideas to try in the classroom for using counters to investigate number patterns.
Imagine you have an unlimited number of four types of triangle. How many different tetrahedra can you make?
We went to the cinema and decided to buy some bags of popcorn so we asked about the prices. Investigate how much popcorn each bag holds so find out which we might have bought.
An activity making various patterns with 2 x 1 rectangular tiles.
Use the lines on this figure to show how the square can be divided into 2 halves, 3 thirds, 6 sixths and 9 ninths.
What is the greatest number of squares you can make by overlapping three squares?
Exploring and predicting folding, cutting and punching holes and making spirals.
What do these two triangles have in common? How are they related?
How can you put five cereal packets together to make different shapes if you must put them face-to-face?
This problem invites you to build 3D shapes using two different triangles. Can you make the shapes from the pictures?
Make a flower design using the same shape made out of different sizes of paper.
This practical problem challenges you to create shapes and patterns with two different types of triangle. You could even try overlapping them.
For this task, you'll need an A4 sheet and two A5 transparent sheets. Decide on a way of arranging the A5 sheets on top of the A4 sheet and explore ...
Can you predict when you'll be clapping and when you'll be clicking if you start this rhythm? How about when a friend begins a new rhythm at the same time?
What are the next three numbers in this sequence? Can you explain why are they called pyramid numbers?
The Tower of Hanoi is an ancient mathematical challenge. Working on the building blocks may help you to explain the patterns you notice.
Have a look at what happens when you pull a reef knot and a granny knot tight. Which do you think is best for securing things together? Why?
Arrange your fences to make the largest rectangular space you can. Try with four fences, then five, then six etc.
Can you create more models that follow these rules?