
Fruity totals
In this interactivity each fruit has a hidden value. Can you deduce what each one is worth?

Tilted squares
It's easy to work out the areas of most squares that we meet, but what if they were tilted?

How far does it move?
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects the distance it travels at each stage.

Semi-regular tessellations
Semi-regular tessellations combine two or more different regular polygons to fill the plane. Can you find all the semi-regular tessellations?

Elevenses


Days and dates

What's it worth?
There are lots of different methods to find out what the shapes are worth - how many can you find?

Cinema problem
A cinema has 100 seats. How can ticket sales make £100 for these different combinations of ticket prices?

Sending a parcel
What is the greatest volume you can get for a rectangular (cuboid) parcel if the maximum combined length and girth are 2 metres?

Speeding up, slowing down
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects its speed at each stage.

Product Sudoku
The clues for this Sudoku are the product of the numbers in adjacent squares.

Opposite vertices
Can you recreate squares and rhombuses if you are only given a side or a diagonal?

Wipeout


Alison's quilt


Funny factorisation

1 step 2 step

Ben's game

Cuboids
Can you find a cuboid that has a surface area of exactly 100 square units. Is there more than one? Can you find them all?

Efficient cutting
Use a single sheet of A4 paper and make a cylinder having the greatest possible volume. The cylinder must be closed off by a circle at each end.

Up and across
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects its vertical and horizontal movement at each stage.

Cola can
An aluminium can contains 330 ml of cola. If the can's diameter is 6 cm what is the can's height?

Which solids can we make?
Interior angles can help us to work out which polygons will tessellate. Can we use similar ideas to predict which polygons combine to create semi-regular solids?

Nine colours

Triangles to tetrahedra
