Use the three triangles to fill these outline shapes. Perhaps you can create some of your own shapes for a friend to fill?
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?
Find your way through the grid starting at 2 and following these operations. What number do you end on?
Make one big triangle so the numbers that touch on the small triangles add to 10.
This task, written for the National Young Mathematicians' Award 2016, involves open-topped boxes made with interlocking cubes. Explore the number of units of paint that are needed to cover the boxes. . . .
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 is the best way to shunt these carriages so that each train can continue its journey?
A dog is looking for a good place to bury his bone. Can you work out where he started and ended in each case? What possible routes could he have taken?
Can you shunt the trucks so that the Cattle truck and the Sheep truck change places and the Engine is back on the main line?
Can you work out what shape is made when this piece of paper is folded up using the crease pattern shown?
10 space travellers are waiting to board their spaceships. There are two rows of seats in the waiting room. Using the rules, where are they all sitting? Can you find all the possible ways?
What happens when you try and fit the triomino pieces into these two grids?
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?
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?
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?
Make a flower design using the same shape made out of different sizes of paper.
Can you make a 3x3 cube with these shapes made from small cubes?
Building up a simple Celtic knot. Try the interactivity or download the cards or have a go on squared paper.
Can you cover the camel with these pieces?
Have a go at making a few of these shapes from paper in different sizes. What patterns can you create?
Move four sticks so there are exactly four triangles.
Can you work out how many cubes were used to make this open box? What size of open box could you make if you had 112 cubes?
Have you ever tried tessellating capital letters? Have a look at these examples and then try some for yourself.
Can you split each of the shapes below in half so that the two parts are exactly the same?
Can you describe a piece of paper clearly enough for your partner to know which piece it is?
How will you go about finding all the jigsaw pieces that have one peg and one hole?
Design an arrangement of display boards in the school hall which fits the requirements of different people.
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?
Imagine a 3 by 3 by 3 cube. If you and a friend drill holes in some of the small cubes in the ways described, how many will have holes drilled through them?
Can you logically construct these silhouettes using the tangram pieces?
Can you fit the tangram pieces into the outline of this telephone?
How many DIFFERENT quadrilaterals can be made by joining the dots on the 8-point circle?
Use the lines on this figure to show how the square can be divided into 2 halves, 3 thirds, 6 sixths and 9 ninths.
Can you fit the tangram pieces into the outline of this sports car?
What is the least number of moves you can take to rearrange the bears so that no bear is next to a bear of the same colour?
Can you fit the tangram pieces into the outline of this goat and giraffe?
Looking at the picture of this Jomista Mat, can you decribe what you see? Why not try and make one yourself?
Can you fit the tangram pieces into the outline of Little Ming playing the board game?
How many different triangles can you make on a circular pegboard that has nine pegs?
Have a go at this 3D extension to the Pebbles problem.
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?
Can you fit the tangram pieces into the outline of Little Fung at the table?
Can you fit the tangram pieces into the outline of the rocket?
Can you fit the tangram pieces into the outline of Wai Ping, Wah Ming and Chi Wing?
Can you see why 2 by 2 could be 5? Can you predict what 2 by 10 will be?
Can you fit the tangram pieces into the outline of the telescope and microscope?
A magician took a suit of thirteen cards and held them in his hand face down. Every card he revealed had the same value as the one he had just finished spelling. How did this work?
A game for two players. You'll need some counters.
Can you fit the tangram pieces into the outline of these rabbits?
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?