I have shared quite a lot of sites in this blog about places where you can find challenging math problems for your intellectual satisfaction. In this post, I am going to introduce a website called Brilliant.org, a problem solving website which provides different levels of physics, computer science, and math problems depending on solver’s ability. […]

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# Monthly Archives: July 2013

## Free Statistics, Combinatorics, Probability Ebooks

Are you looking for free math ebooks? Below are the free and downloadable statictics, combinatorics, and probability ebooks in PDF and other formats. I am going to update the list from time to time so you might want to bookmark this page. For more free math ebooks and other freebies, please visit the Algebra and […]

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## 8 Amazing Mechanical Calculators Before Modern Computers

Before there are graphing calculators, spreadsheets and computer algebra systems, mathematicians and inventors searched for solutions to ease the burden of calculation. Today we celebrate human achievement in creating these calculators. Below are the 8 mechanical calculators before modern computers were invented. 1. Abacus (ca. 2700 BC) Although abacus is not mechanical, it was one […]

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