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Codes and Inverses

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 

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

Satisfying Statements 
Age 11 to 14
Challenge Level Yellow star

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

Statement Snap 
Age 7 to 14
Challenge Level Yellow star

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

Charlie's Delightful Machine 
Age 11 to 16
Challenge Level Yellow star

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 
Age 14 to 16
Challenge Level Yellow star

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

Which Spinners? 
Age 14 to 18
Challenge Level Yellow star

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

Data Matching 
Age 14 to 18
Challenge Level Yellow star

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

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The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.

NRICH is part of the family of activities in the Millennium Mathematics Project.

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