A Code Breaker puzzle on reading two-set Venn diagrams. Each of the 13 tiles shows a Venn diagram with the number in each region and asks one question. Students look their answer up in the Code Box, write down the letter it unlocks, then unscramble all thirteen letters to find a hot snack.

The questions build from how many in A, in B and altogether, through A or B, not in A, not in B, A but not B and only one set, to three tiles where a total is given and students work out the missing number. The Code Box includes the answers that common slips give, such as 5 for anyone who reads ‘in A’ as the left-hand number only, so a wrong answer unlocks a letter that will not fit the word.

Answers are included as a separate file. One puzzle per A4.

Suitable for GCSE Foundation (AQA P6) and for Key Stage 3 classes working on Venn diagrams.

AI was used to help create this resource, working from my own lesson design.