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title: "Twelve Coins"
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published_at: "2020-10-27T17:13:27+00:00"
modified_at: "2025-02-02T08:13:56+00:00"
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excerpt: "Last month we had a puzzle about identifying one of 12 coins that might be conterfeit, all of the coins being of the same denomination and the same weight except if there is a conterfeit coin it is either lighter or heavier. The suggestion was that we would print a program from a reader, if…"
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authors: "Dick Wagner"
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issue: "3"
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---

# Twelve Coins

Last month we had a puzzle about identifying one of 12 coins that might be conterfeit, all of the coins being of the same denomination and the same weight except if there is a conterfeit coin it is either lighter or heavier. The suggestion was that we would print a program from a reader, if such was offered. We did get a response from Donald Lambert (ZXir QLive Alive!) with an explanation of how he would determine the answer, but not a program. So, here is the program as given in the book. Brain Games for Kids & Adults for Apple II. As this is in GWBASIC, I will attempt to convert it to Sinclair BASIC for next month.