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Posted on November 13, 2010

Facebook Worldwide (Part 2), 2010
Facebook Worldwide (Part 2), 2010.

Posted on July 10, 2013

Exact Percentages and Prime Factors
Exact Percentages, Simplifying Fractions, Prime Factors and Greatest Common Divisors.

Posted on January 13, 2021

Word Ladders and Equivalence Classes
Guest post.

Posted on May 24, 2015

Buffon's Needle
Calculating Pi by dropping needles on the floor.