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Your friend plays two losing games at the casino, switches between them at random, and starts winning. Parrondo's paradox — where two individually losing strategies combine into a winner — explained through simulation, mod-3 ratchet dynamics, and a parameter sweep.

When the zombie apocalypse breaks out and civilisation has collapsed you need π. But all you have is a shotgun. A look at importance sampling through the lens of a gloriously absurd 2014 paper — and a Python simulation showing how you can estimate π with any distribution.