Math challenge Make Any Number From Four π’s

Math challenge Make Any Number From Four π’s

Happy Pi Day! Here’s the four pi’s challenge: write an equation using pi exactly four times to equal 0, 1, 2, … and any integer. There’s an incredible solution, with a huge assist from the Nobel Laureate physicist Paul Dirac! Thanks to Tai C. Chiang, Peter, Puzzling and the StackExchange community!