UCLA Olga Radko Endowed Math Circle
Olga Radko: In Memoriam
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9/30/2012 -- Beginners Circle: Casting out Nines, and other types of Math Magic
In this lesson, we look at casting of nines as an application of modular arithmetic.
Modular Arithmetic, Division, Divisibility Rules.
Casting out Nines, and other types of Math Magic
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