The mathematical treasure hunt, produced by Mathigon, is an engaging mathematics lesson. Students follow a trail of clues and mathematical problems around the school site; each clue contains a hint to where the next clue is hidden. The questions are taken from a wide range of different topics, and often not directly related to the mathematics curriculum. Some of the problems lend themselves to further discussion afterwards. The answer to each problem is an integer, and all the answers – once decoded into letters – spell the location of the treasure. There are two versions, one aimed at primary school aged students, the other secondary. The areas of mathematics covered include cryptography, combinatorics, graph theory, Pascal’s triangle, prime numbers, probability and platonic solids.