The 2020 Invariants Michaelmas Puzzle Challenge is underway! Check out the problems below and look through our archives for previous problems and solutions!

Solutions should be submitted to puzzles@invariants.org.uk no later than 14:59 BST on the Sunday after they are posted. Please quote your name, your institution, the week, and the numbers of the problems attempted in the subject line, e.g. Septus Quizonacci - University of Oxford - Week 7 - Problems 1,2,3.

Week 1: 11 Oct - 18 Oct

Submit solutions to puzzles@invariants.org.uk. Find past problems from this competition and others here

Summer 2020 Winners: