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?
How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?
Can you make the most extraordinary, the most amazing, the most unusual patterns/designs from these triangles which are made in a special way?
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?
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 this challenge, you will work in a group to investigate circular fences enclosing trees that are planted in square or triangular arrangements.
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?
This practical investigation invites you to make tessellating shapes in a similar way to the artist Escher.
Can you create more models that follow these rules?
Have a go at this 3D extension to the Pebbles problem.
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?
When newspaper pages get separated at home we have to try to sort them out and get things in the correct order. How many ways can we arrange these pages so that the numbering may be different?
Investigate the number of paths you can take from one vertex to another in these 3D shapes. Is it possible to take an odd number and an even number of paths to the same vertex?
A challenging activity focusing on finding all possible ways of stacking rods.
How many triangles can you make on the 3 by 3 pegboard?
If we had 16 light bars which digital numbers could we make? How will you know you've found them all?
This tricky challenge asks you to find ways of going across rectangles, going through exactly ten squares.
Arrange your fences to make the largest rectangular space you can. Try with four fences, then five, then six etc.
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.
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
This challenge involves eight three-cube models made from interlocking cubes. Investigate different ways of putting the models together then compare your constructions.
What is the smallest cuboid that you can put in this box so that you cannot fit another that's the same into it?
What do these two triangles have in common? How are they related?
Explore the different tunes you can make with these five gourds. What are the similarities and differences between the two tunes you are given?
This practical problem challenges you to create shapes and patterns with two different types of triangle. You could even try overlapping them.
Can you find ways of joining cubes together so that 28 faces are visible?
A group of children are discussing the height of a tall tree. How would you go about finding out its height?
How many models can you find which obey these rules?
Make new patterns from simple turning instructions. You can have a go using pencil and paper or with a floor robot.
How many different ways can you find of fitting five hexagons together? How will you know you have found all the ways?
Use the interactivity to find all the different right-angled triangles you can make by just moving one corner of the starting triangle.
Place the 16 different combinations of cup/saucer in this 4 by 4 arrangement so that no row or column contains more than one cup or saucer of the same colour.
You cannot choose a selection of ice cream flavours that includes totally what someone has already chosen. Have a go and find all the different ways in which seven children can have ice cream.
The letters of the word ABACUS have been arranged in the shape of a triangle. How many different ways can you find to read the word ABACUS from this triangular pattern?
Ana and Ross looked in a trunk in the attic. They found old cloaks and gowns, hats and masks. How many possible costumes could they make?
If you have three circular objects, you could arrange them so that they are separate, touching, overlapping or inside each other. Can you investigate all the different possibilities?
The challenge here is to find as many routes as you can for a fence to go so that this town is divided up into two halves, each with 8 blocks.
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?
How many shapes can you build from three red and two green cubes? Can you use what you've found out to predict the number for four red and two green?
In a Magic Square all the rows, columns and diagonals add to the 'Magic Constant'. How would you change the magic constant of this square?
What is the smallest number of tiles needed to tile this patio? Can you investigate patios of different sizes?
This challenge encourages you to explore dividing a three-digit number by a single-digit number.
How could you put eight beanbags in the hoops so that there are four in the blue hoop, five in the red and six in the yellow? Can you find all the ways of doing this?
Cut differently-sized square corners from a square piece of paper to make boxes without lids. Do they all have the same volume?
Roll two red dice and a green dice. Add the two numbers on the red dice and take away the number on the green. What are all the different possible answers?
Let's suppose that you are going to have a magazine which has 16 pages of A5 size. Can you find some different ways to make these pages? Investigate the pattern for each if you number the pages.
Suppose there is a train with 24 carriages which are going to be put together to make up some new trains. Can you find all the ways that this can be done?
Investigate the different ways you could split up these rooms so that you have double the number.
There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?