Rotating Coins Around Coins

You have two coins of equal size on a table, situated end to end vertically. If you roll the top coin around the bottom coin until it returns to its original position, how many times will it have rotated?

Twice. See this video for more details.

Posted in Brain Teasers


1 Comment on "Rotating Coins Around Coins"

Mark W says
April 24, 2023 @ 02:21

Interesting, I would have thought the answer to be Pi( 3.142… ) ?

Apparently Not!

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