The seven bridges of Konigsberg
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Dear Dirichlet, Issue 18
Phone assistants, duplicating pastries, and being a 10 anywhere else are among the topics of discussion in this issue's Dear Dirichlet advice column
Penguins: the emperors of fluid dynamics
Sam Harris looks at how Pingu and his friends can stay cosy
Winning the Chalkdust coin game
How to win a game when your expected score is 0
Seven things you didn’t notice in Issue 04
How many did you spot?
Puzzles, Issue 04
Solve the puzzles that appeared in Issue 04.
How to make: a hexaflexagon
Make an amazing three faced hexagon