# All-time Top 20 Mathematics Posts

This is Math and Multimedia’s All Time Top Mathematics posts, or articles that have the most number of page views. This list does not include articles which contains (link list such as Free Calculus Ebooks).

- The Mathematics of Tiling
- Limit by proof: Example 1
- How to use the summation symbol
- The Algebraic and Geometric Proof of the Pythagorean Theorem
- Using Mathematics to Win the Lottery
- The Definition of Undefined
- Math Exercises, Problems, and Investigations
- An extensive explanation about the definition of limits
- Rational and Irrational Numbers
- Why do we reverse/flip the inequality sign?
- Introduction to Mathematical Proofs
- Arithmetic Sequences and Linear Functions
- Pythagorean Theorem, Distance Formula, and Equation of a Circle
- Paper Folding: Locating the square root of a number on the number line
- Generating Pythagorean Triples from Square Numbers
- The Inscribed Angle Theorem and Its Applications
- Finger Multiplication
- Mathematics in Microsoft Office
- Simon’s Favorite Factoring Trick
- Sum of the Interior Angles of a Polygon

That’s all for this year; we will update this list in January 2013. You may also want to visit the All Time Top-Rated Math Posts.