Challenge Level

How do you balance the environmental impacts and nutritional benefits of different foods?

Challenge Level

Frosty the Snowman is melting. Can you work out how much less snow he contains when he is at half his starting height?

Challenge Level

Can you use the given information to work out how much plastic a family recycles?

Challenge Level

Can you find the most efficient way to connect four towns?

Challenge Level

Can you solve the clues to find out who's who on the friendship graph?