Equations and Formulae - Stage 3

What's it Worth?

Age 11 to 16
Challenge Level

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

Temperature

Age 11 to 14
Challenge Level

Is there a temperature at which Celsius and Fahrenheit readings are the same?

Your Number Was...

Age 11 to 14
Challenge Level

Think of a number and follow my instructions. Tell me your answer, and I'll tell you what you started with! Can you explain how I know?

Equations and Formulae - Short Problems

Age 11 to 16

A collection of short problems on equations and formulae.

Fruity Totals

Age 7 to 16
Challenge Level

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