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Week 2 Summer 2022 Puzzle Challenge
Just one from the archives. Feel free to post thoughts in the comments.
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2020 Invariants Michaelmas Puzzle Challenge
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.