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.
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?
Use the three triangles to fill these outline shapes. Perhaps you can create some of your own shapes for a friend to fill?
Investigate the smallest number of moves it takes to turn these mats upside-down if you can only turn exactly three at a time.
Can you each work out the number on your card? What do you notice? How could you sort the cards?
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 triangles can you make on the 3 by 3 pegboard?
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 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?
Ahmed is making rods using different numbers of cubes. Which rod is twice the length of his first rod?
Kimie and Sebastian were making sticks from interlocking cubes and lining them up. Can they make their lines the same length? Can they make any other lines?
If you split the square into these two pieces, it is possible to fit the pieces together again to make a new shape. How many new shapes can you make?
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.
Are all the possible combinations of two shapes included in this set of 27 cards? How do you know?
An activity making various patterns with 2 x 1 rectangular tiles.
Make your own double-sided magic square. But can you complete both sides once you've made the pieces?
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?
How can you put five cereal packets together to make different shapes if you must put them face-to-face?
Here is a version of the game 'Happy Families' for you to make and play.
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?
Factors and Multiples game for an adult and child. How can you make sure you win this game?
These practical challenges are all about making a 'tray' and covering it with paper.
If these balls are put on a line with each ball touching the one in front and the one behind, which arrangement makes the shortest line of balls?
How many models can you find which obey these rules?
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?
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?
Can you make dice stairs using the rules stated? How do you know you have all the possible stairs?
Can you split each of the shapes below in half so that the two parts are exactly the same?
Can you order pictures of the development of a frog from frogspawn and of a bean seed growing into a plant?
Have a go at making a few of these shapes from paper in different sizes. What patterns can you create?
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?
Paint a stripe on a cardboard roll. Can you predict what will happen when it is rolled across a sheet of paper?
How many different cuboids can you make when you use four CDs or DVDs? How about using five, then six?
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 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?
Use the lines on this figure to show how the square can be divided into 2 halves, 3 thirds, 6 sixths and 9 ninths.
The Man is much smaller than us. Can you use the picture of him next to a mug to estimate his height and how much tea he drinks?
If you have ten counters numbered 1 to 10, how many can you put into pairs that add to 10? Which ones do you have to leave out? Why?
Use the tangram pieces to make our pictures, or to design some of your own!
Can you put these shapes in order of size? Start with the smallest.
Can you make the birds from the egg tangram?
In this town, houses are built with one room for each person. There are some families of seven people living in the town. In how many different ways can they build their houses?
Can you work out what shape is made when this piece of paper is folded up using the crease pattern shown?
Can you describe a piece of paper clearly enough for your partner to know which piece it is?
A game to make and play based on the number line.
Move four sticks so there are exactly four triangles.
What is the smallest cuboid that you can put in this box so that you cannot fit another that's the same into it?
This was a problem for our birthday website. Can you use four of these pieces to form a square? How about making a square with all five pieces?
What is the greatest number of squares you can make by overlapping three squares?
Have you ever tried tessellating capital letters? Have a look at these examples and then try some for yourself.