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Phone assistants, duplicating pastries, and being a 10 anywhere else are among the topics of discussion in this issue's Dear Dirichlet advice column

Matthew Scroggs sets the first puzzle. Can you solve it?

Win this year's best book of geometry puzzles

Colin Beveridge looks at different designs for 2- and 3-dimensional tiles

How crime science, and the maths it uses, is helping the police fight crime

Does form going into the play-offs predict your success?