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Learn how to model your heart one beat at a time ❤️
Chalkdust’s Christmas conundrums
As the festive season strikes again, we'll be dishing out more fiendish puzzles – this time with prizes!
Pretend numbers
20 questions, the axiom of choice and colouring sequences.
Tupper’s self-referential formula
A hideous equation that hides beautiful images, and much (much) more besides...
Finding the edge of your images
How can we identify objects in photos, to diagnose cancer or predict the weather? Using gradients!