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Solution To Derb's October Brainteaser
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November 23, 2017, 02:03 PM
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I am sorry to have been so late posting a solution to the math puzzle in my October Diary.  The solution is here.

As I note in the solution: "It's certainly a very cute problem … (Defined to mean: It'll waste hours of your time.)"

Many thanks to the friend who sent me that.