We must start and end at one of the bottom points
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Oπnions: In defence of toy models
Calum gets on his soap box about toy models
Issue 18
Twitch streaming, abacuses and Pascal's secrets feature in our AW23 issue! Plus all your favourite puzzles & columns.
Weirdonacci numbers
Like Fibonacci, but weird. Robert J Low and Thierry Platini explain
Christmas competition #2: ‘More geometry snacks’
Win this year's best book of geometry puzzles
Christmas cracker joke II
This post was part of the Chalkdust 2016 Advent Calendar. Newton: "Are you going to the Fibonacci themed Christmas party?" Euler: "Yes! I heard it's going to be as big as the two previous years put together."
Breaking out of the prisoner’s dilemma
What happens if you play the prisoners' dilemma against yourself?