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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
The Josephus problem
Alvin Choy works out who will be the last one left in
Significant figures: John Conway
The story of an unforgettable mathematician.
Page 3 model: Cows
How big is the biggest cow?
Complex numbers and algebra
Exploring the beauty of complex numbers, their origins and why they are important
Can we do good more effectively?
Choosing which charity we donate money to shouldn't be an entirely emotional decision.