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

Statement Snap 

Age 7 to 14 Challenge Level:
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:
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:
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:
Can you work out which spinners were used to generate the frequency charts?

Data Matching 

Age 16 to 18 Challenge Level:
Use your skill and judgement to match the sets of random data.