A Problem Squared

085 = Coin Collections and Pin Selections


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đŸȘ™ How many coins would you need to sort through to collect all commemorative €2 coins in circulation? 


📍How do you display enamel pins?! 


đŸ’Œ The Any Other Business briefcase is
mostly open. 


Here’s the Coupon Collector’s problem video: https://www.youtube.com/watch?v=BstloCx8KDk

You can see more on the “Number of banknotes/coins returned from circulation in Euro Area, Euro area (changing composition), Monthly” here: https://data.ecb.europa.eu/data/datasets/BKN/BKN.M.U2.RE10.C.20P0.AS.F.E

And, Wiki Sources: “2 euro commemorative coins” on good old Wikipedia: https://en.wikipedia.org/wiki/2_euro_commemorative_coins

As always, send your problems and solutions to our website: www.aproblemsquared.com.

And, if you want more from A Problem Squared, you can also find us on Twitter, Instagram, Discord and on Patreon.


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A Problem SquaredBy Matt Parker, Bec Hill

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