085 = Coin Collections and Pin Selections

🪙 How many coins would you need to sort through to collect all commemorative €2 coins in circulation?  📍How do you display enamel pins?!  💼 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.