The impossible chessboard puzzle
14:41
How colliding blocks act like a beam of light...to compute pi.
32:17
The almost impossible chessboard puzzle
33:01
The Man Who Almost Broke Math (And Himself...)
29:42
Five puzzles for thinking outside the box
53:13
Is This Sudoku Impossible?
23:07
The Forbidden Knowledge of Washers
23:56
Why Trump's tariff chaos actually makes sense (big picture)
10:43