The hardest problem on the hardest test

2017-12-08

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But why is a sphere's surface area four times its shadow?

2018-12-02

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Why do prime numbers make these spirals? | Dirichlet’s theorem

2019-10-08

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Who cares about topology? (Inscribed rectangle problem)

2016-11-04

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The absurd circle division pattern explained | Moser's circle problem

2023-07-02

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Alice, Bob, and the average shadow of a cube

2021-12-20

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The unreasonable effectiveness of complex numbers in discrete math

2022-05-23

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Why slicing a cone gives an ellipse

2018-08-01

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Sneaky Topology | The Borsuk-Ulam theorem and stolen necklaces

2018-11-18

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Thinking outside the 10-dimensional box

2017-08-11

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How to lie using visual proofs

2022-07-03

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The unexpectedly hard windmill question (2011 IMO, Q2)

2019-08-04

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The impossible chessboard puzzle

2020-07-05

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All possible pythagorean triples, visualized

2017-05-26

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The three utilities puzzle with math/science YouTubers

2017-12-23

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