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Codebreaking for spies

When you think of secret agents, you might think of disguises, magnifying glasses, foreign travel… but would you think of maths? Help us on our secret mission to crack codes and unravel secret messages using your logical and mathematical thinking.

Write a secret message and see if anyone can crack it?

What you'll need

What you’ll need Codebreaking Activity Sheet (available to download from the ‘Resources’ section below) Paper Scissors Pencil / pen Split pin (optional) Lemon (optional)