*The author describes two methods that Fibonacci might have used to find an approximate solution to a cubic equation posed in the court of the Holy Roman Emperor, Fredrick II in 1225.*

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*The author shows how to solve a class of analytic functions using an approach demonstrating a surprising connection between multivariable calculus and linear algebra.*

*In this paper the radix sorting algorithm is used to explain why Geronne`s 3 pile card trick works. Generalizations are explored.*