Equations & Formulae

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

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?

These eleven shapes each stand for a different number. Can you use the multiplication sums to work out what they are?

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

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

Can you find the values at the vertices when you know the values on the edges?

Four friends must cross a bridge. How can they all cross it in just 17 minutes?

In 15 years' time my age will be the square of my age 15 years ago. Can you work out my age, and when I had other special birthdays?

How have "Warmsnug" arrived at the prices shown on their windows? Which window has been given an incorrect price?

When I park my car in Mathstown, there are two car parks to choose from. Can you help me to decide which one to use?