The impossible chessboard puzzle

Published Jul 5, 2020
Lesson by Grant Sanderson
Why do prime numbers make these spirals? Circle Division Solution
The hardest problem on the hardest test The unexpectedly hard windmill question (2011 IMO, Q2) Why do prime numbers make these spirals? The impossible chessboard puzzle Circle Division Solution The three utilities puzzle with math/science YouTubers

Text version of this lesson coming soon