I read his column, Mathematical Games, for years until he retired in 1981. Also most of his books, including The Incredible Dr. Matrix, which had the puzzle, what is special about 8,549,176,320?
http://www.nytimes.com/2010/05/24/us/24 ... obituaries
http://www.nytimes.com/2010/05/24/us/24 ... obituaries
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