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Codes and Inverses

In this feature, we have chosen a selection of problems related to the theme of Codes and Codebreaking. The article Codebreakers has suggestions about how you can inspire your students through the exciting context of codes and spies to be curious about a wide range of mathematical ideas.
Codebreakers link

Codebreakers 

This article for Primary and Secondary teachers is all about the mathematics behind solving puzzles, unravelling mysteries and breaking codes.

Satisfying Statements link

Satisfying Statements live

Stage: 2 and 3 Challenge Level: Challenge Level:1

Can you find any two-digit numbers that satisfy all of these statements?

Statement Snap link

Statement Snap 

Stage: 2 and 3 Challenge Level: Challenge Level:1

You'll need to know your number properties to win a game of Statement Snap...

Charlie's Delightful Machine link

Charlie's Delightful Machine live

Stage: 3 and 4 Challenge Level: Challenge Level:1

Here is a machine with four coloured lights. Can you develop a strategy to work out the rules controlling each light?

A Little Light Thinking link

A Little Light Thinking live

Stage: 4 Challenge Level: Challenge Level:1

Here is a machine with four coloured lights. Can you make two lights switch on at once? Three lights? All four lights?

Which Spinners? link

Which Spinners? live

Stage: 4 and 5 Challenge Level: Challenge Level:1

Can you work out which spinners were used to generate the frequency charts?

Data Matching link

Data Matching live

Stage: 5 Challenge Level: Challenge Level:1

Use your skill and judgement to match the sets of random data.