Equations and Formulae - Stage 3

This is part of our Secondary Curriculum collection of favourite rich tasks arranged by topic.

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?


Age 11 to 14 Challenge Level:

Water freezes at 0°Celsius (32°Fahrenheit) and boils at 100°C (212°Fahrenheit). Is there a temperature at which Celsius and Fahrenheit readings are the same?

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?

Equations and Formulae Stage 3 - Short Problems

Age 11 to 14

A collection of short Stage 3 problems on equations and formulae.

You may also be interested in this collection of activities from the STEM Learning website, that complement the NRICH activities above.