Mike DeHaan applies his Bachelor of Math in Computer Sciences degree, years of Cobol programming and quality assurance (including testing credit card interest calculations) to research and present mathematical theory for the layman.

Here in Decoded Science, Mike's main focus is mathematics. He covers basic mathematical theory, uncovers paradoxes, applies calculations to popular movies, and reports on math news.
Mike began writing professionally in 2010 as the sole proprietor of DeHaan Services.

Read his other work on Environmental Graffiti and Suite101.

## How to Find Pythagorean Dates for Any Year

You can find this year’s Pythagorean dates – dates that fit into the Pythagorean theorem – with a simple spreadsheet that finds right angle days.

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## How to Calculate Compound Interest

You can use compound interest in many areas, from credit cards and loans to calculating population growth; first, you need to know how the formulas work.

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## How to Calculate Simple Interest: Math Calculations

Calculating simple interest is really very simple, once you learn the meaning behind the math terms and formulas used in the calculations.

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## Cancer Research Applies a Markov Chain Monte Carlo Approach

Cancer research just took a leap forward, with the application of math – namely a Markov Chain Monte Carlo approach to predicting cancer progression.

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## The Circled Square Math Problem Claims Pi Equals Four

Does the troll’s circle-square math cartoon accurately demonstrate that pi is closer to 4, instead of the accepted value, 3.1415… and so on?

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