Equations and Formulae: Age 11-14

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

If you are a teacher, you can find the whole collection on our Secondary Curriculum teacher page.
Alternatively, if you are a student, you'll find the same problems on our Secondary Curriculum student page.

problem
Favourite

Fruity Totals

Age

7 to 16

Challenge level

1 out of 3

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

Your Number Was...

Age

11 to 14

Challenge level

1 out of 3

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?
problem
Favourite

Temperature

Age

11 to 14

Challenge level

2 out of 3

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

What's It Worth?

Age

11 to 16

Challenge level

1 out of 3

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

Crossing the Bridge

Age

11 to 18

Challenge level

2 out of 3

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