Vsauce

The Missing Dollar Riddle

Kevin explores the math and mystery behind a classic riddle that just… doesn’t make sense. Three friends go out to lunch and split a $30 bill evenly. Each pays ten bucks. Then the waitress realizes the bill should’ve been only $25.

She gives the busboy a $5 refund, but he can’t figure out how to evenly divide five dollars three ways. The customers don’t even know they’ve been overcharged, so he just takes a $2 tip for himself and hands the three customers one dollar each.

If the customers only paid $9 each for lunch and the busboy pocketed $2, where is the missing dollar?!?

Walkingame’s Tutor’s Assistant: https://archive.org/details/walkingamesarit00walkgoog/page/n174

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Hosted, Produced, And Edited by Kevin Lieber
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Twitter: https://twitter.com/kevinlieber
Website: http://kevinlieber.com

Research And Writing by Matthew Tabor
https://twitter.com/matthewktabor

Huge Thanks To Paula Lieber
https://www.etsy.com/shop/Craftality

Get Vsauce’s favorite science and math toys delivered to your door!
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Special Thanks Eric Langlay
https://www.youtube.com/c/ericlanglay

Select Music By Jake Chudnow: http://www.youtube.com/user/JakeChudnow

MY PODCAST — THE CREATE UNKNOWN
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