How many different ways can you find of fitting five hexagons together? How will you know you have found all the ways?
This practical problem challenges you to create shapes and patterns with two different types of triangle. You could even try overlapping them.
How many triangles can you make on the 3 by 3 pegboard?
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?
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?
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?
A challenging activity focusing on finding all possible ways of stacking rods.
Can you make the most extraordinary, the most amazing, the most unusual patterns/designs from these triangles which are made in a special way?
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?
Use your mouse to move the red and green parts of this disc. Can you make images which show the turnings described?
Explore ways of colouring this set of triangles. Can you make symmetrical patterns?
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?
If we had 16 light bars which digital numbers could we make? How will you know you've found them all?
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?
Arrange your fences to make the largest rectangular space you can. Try with four fences, then five, then six etc.
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?
Sort the houses in my street into different groups. Can you do it in any other ways?
An activity making various patterns with 2 x 1 rectangular tiles.
How can you arrange these 10 matches in four piles so that when you move one match from three of the piles into the fourth, you end up with the same arrangement?
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?
Try continuing these patterns made from triangles. Can you create your own repeating pattern?
These pictures show squares split into halves. Can you find other ways?
What is the smallest cuboid that you can put in this box so that you cannot fit another that's the same into it?
Use the interactivity to investigate what kinds of triangles can be drawn on peg boards with different numbers of pegs.
What do these two triangles have in common? How are they related?
Is there a best way to stack cans? What do different supermarkets do? How high can you safely stack the cans?
Can you find ways of joining cubes together so that 28 faces are visible?
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?
Have a go at this 3D extension to the Pebbles problem.
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 models can you find which obey these rules?
This tricky challenge asks you to find ways of going across rectangles, going through exactly ten squares.
Which way of flipping over and/or turning this grid will give you the highest total? You'll need to imagine where the numbers will go in this tricky task!
In how many ways can you stack these rods, following the rules?
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?
Use the interactivity to find all the different right-angled triangles you can make by just moving one corner of the starting triangle.
There are to be 6 homes built on a new development site. They could be semi-detached, detached or terraced houses. How many different combinations of these can you find?
Explore the triangles that can be made with seven sticks of the same length.
This practical investigation invites you to make tessellating shapes in a similar way to the artist Escher.
How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?
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?
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 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.
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?
This challenge involves calculating the number of candles needed on birthday cakes. It is an opportunity to explore numbers and discover new things.
What is the largest cuboid you can wrap in an A3 sheet of paper?
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.
The red ring is inside the blue ring in this picture. Can you rearrange the rings in different ways? Perhaps you can overlap them or put one outside another?
What is the smallest number of tiles needed to tile this patio? Can you investigate patios of different sizes?
Can you continue this pattern of triangles and begin to predict how many sticks are used for each new "layer"?