These rectangles have been torn. How many squares did each one have inside it before it was ripped?
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?
This article for teachers suggests activities based on pegboards, from pattern generation to finding all possible triangles, for example.
How many ways can you find of tiling the square patio, using square tiles of different sizes?
Use the interactivity to find all the different right-angled triangles you can make by just moving one corner of the starting triangle.
What is the smallest number of tiles needed to tile this patio? Can you investigate patios of different sizes?
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?
Can you draw a square in which the perimeter is numerically equal to the area?
What is the largest 'ribbon square' you can make? And the smallest? How many different squares can you make altogether?
These practical challenges are all about making a 'tray' and covering it with paper.
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?
Find all the different shapes that can be made by joining five equilateral triangles edge to edge.
Can you find all the different triangles on these peg boards, and find their angles?
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?
This tricky challenge asks you to find ways of going across rectangles, going through exactly ten squares.
This activity investigates how you might make squares and pentominoes from Polydron.
A thoughtful shepherd used bales of straw to protect the area around his lambs. Explore how you can arrange the bales.
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 we had 16 light bars which digital numbers could we make? How will you know you've found them all?
How many rectangles can you find in this shape? Which ones are differently sized and which are 'similar'?
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 activity making various patterns with 2 x 1 rectangular tiles.
Can you help the children find the two triangles which have the lengths of two sides numerically equal to their areas?
This practical challenge invites you to investigate the different squares you can make on a square geoboard or pegboard.
How many different triangles can you make on a circular pegboard that has nine pegs?
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?
Cut differently-sized square corners from a square piece of paper to make boxes without lids. Do they all have the same volume?
How many DIFFERENT quadrilaterals can be made by joining the dots on the 8-point circle?
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?
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?
What is the best way to shunt these carriages so that each train can continue its journey?
In this game for two players, you throw two dice and find the product. How many shapes can you draw on the grid which have that area or perimeter?
Arrange eight of the numbers between 1 and 9 in the Polo Square below so that each side adds to the same total.
Just four procedures were used to produce a design. How was it done? Can you be systematic and elegant so that someone can follow your logic?
Place eight dots on this diagram, so that there are only two dots on each straight line and only two dots on each circle.
Seven friends went to a fun fair with lots of scary rides. They decided to pair up for rides until each friend had ridden once with each of the others. What was the total number rides?
Put 10 counters in a row. Find a way to arrange the counters into five pairs, evenly spaced in a row, in just 5 moves, using the rules.
How can you put five cereal packets together to make different shapes if you must put them face-to-face?
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?
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?
How many trapeziums, of various sizes, are hidden in this picture?
What can you say about these shapes? This problem challenges you to create shapes with different areas and perimeters.
In this investigation, you must try to make houses using cubes. If the base must not spill over 4 squares and you have 7 cubes which stand for 7 rooms, what different designs can you come up with?
Systematically explore the range of symmetric designs that can be created by shading parts of the motif below. Use normal square lattice paper to record your results.
How will you go about finding all the jigsaw pieces that have one peg and one hole?
Swap the stars with the moons, using only knights' moves (as on a chess board). What is the smallest number of moves possible?
This task challenges you to create symmetrical U shapes out of rods and find their areas.