Skip over navigation
Satisfying Statements
Statement Snap
Charlie's Delightful Machine
A Little Light Thinking
Which Spinners?
Data Matching
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 14Challenge Level 
Age 11 to 14
Challenge Level
Can you find any two-digit numbers that satisfy all of these statements?
Statement Snap Age 7 to 14Challenge Level
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 16Challenge Level
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 16Challenge Level
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 18Challenge Level
Age 14 to 18
Challenge Level
Can you work out which spinners were used to generate the frequency charts?
Data Matching Age 14 to 18Challenge Level
Age 14 to 18
Challenge Level
Use your skill and judgement to match the sets of random data.