These pictures show squares split into halves. Can you find other ways?
How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?
I cut this square into two different shapes. What can you say about the relationship between them?
Can you create more models that follow these rules?
What is the smallest cuboid that you can put in this box so that you cannot fit another that's the same into it?
Try continuing these patterns made from triangles. Can you create your own repeating pattern?
This practical investigation invites you to make tessellating shapes in a similar way to the artist Escher.
Arrange your fences to make the largest rectangular space you can. Try with four fences, then five, then six etc.
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?
An activity making various patterns with 2 x 1 rectangular tiles.
What is the smallest number of tiles needed to tile this patio? Can you investigate patios of different sizes?
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.
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?
Can you find ways of joining cubes together so that 28 faces are visible?
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?
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?
Is there a best way to stack cans? What do different supermarkets do? How high can you safely stack the cans?
Use your mouse to move the red and green parts of this disc. Can you make images which show the turnings described?
Can you make these equilateral triangles fit together to cover the paper without any gaps between them? Can you tessellate isosceles triangles?
What do these two triangles have in common? How are they related?
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.
Investigate the different shaped bracelets you could make from 18 different spherical beads. How do they compare if you use 24 beads?
Investigate all the different squares you can make on this 5 by 5 grid by making your starting side go from the bottom left hand point. Can you find out the areas of all these squares?
Use the interactivity to investigate what kinds of triangles can be drawn on peg boards with different numbers of pegs.
This practical problem challenges you to create shapes and patterns with two different types of triangle. You could even try overlapping them.
We need to wrap up this cube-shaped present, remembering that we can have no overlaps. What shapes can you find to use?
Can you find out how the 6-triangle shape is transformed in these tessellations? Will the tessellations go on for ever? Why or why not?
Vincent and Tara are making triangles with the class construction set. They have a pile of strips of different lengths. How many different triangles can they make?
Sort the houses in my street into different groups. Can you do it in any other ways?
Explore ways of colouring this set of triangles. Can you make symmetrical patterns?
What is the largest cuboid you can wrap in an A3 sheet of paper?
Use the interactivity to find all the different right-angled triangles you can make by just moving one corner of the starting triangle.
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?
How many ways can you find of tiling the square patio, using square tiles of different sizes?
In this challenge, you will work in a group to investigate circular fences enclosing trees that are planted in square or triangular arrangements.
Investigate how this pattern of squares continues. You could measure lengths, areas and angles.
How many models can you find which obey these rules?
A group of children are discussing the height of a tall tree. How would you go about finding out its height?
This challenge involves eight three-cube models made from interlocking cubes. Investigate different ways of putting the models together then compare your constructions.
How many faces can you see when you arrange these three cubes in different ways?
Explore the triangles that can be made with seven sticks of the same length.
Have a go at this 3D extension to the Pebbles problem.
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?
Make new patterns from simple turning instructions. You can have a go using pencil and paper or with a floor robot.
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?
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
This challenge asks you to investigate the total number of cards that would be sent if four children send one to all three others. How many would be sent if there were five children? Six?
It starts quite simple but great opportunities for number discoveries and patterns!
How many different shaped boxes can you design for 36 sweets in one layer? Can you arrange the sweets so that no sweets of the same colour are next to each other in any direction?