Watch: where to stand in the circle to be the last one left

The Josephus problem: people in a circle are eliminated in turn, and there is a pattern to which position survives.

— Numberphile, The Josephus Problem - Numberphile — YouTube video

One credited idea per card. No filler. Swipe the rest in Savvy.

Keep swiping — it's free Works right in your browser. No app store needed.

More Puzzles

All Puzzles cards →
More from Numberphile →

Five ideas worth knowing, every week

The week's best cards and a puzzle, credited as always. Free, unsubscribe any time.