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Sara Logsdon looks to graph theory and abstract algebra for help on the puzzle page
Dear Dirichlet, Issue 19
Game shows, flight and social media bots are among the problems solved in this issue's Dear Dirichlet agony aunt column
An irrational problem
Investigating the power of thinking rationally
Folding nets into Johnson solids
How does one produce a net for the broadest class of polyhedra?
How to make: a slide rule
Make calculations easy with this simple-to-make slide rule
Constructing a sphere with 455 cups
Paper cups do not follow a hexagonal pattern and the cones do not meet at a single point, but they do make a gigantic sphere