# All-time Top 10 Mathematics Posts

Here are the All-time Top 10 Mathematics posts when it comes to number of hits. Try reading the documents to see why they are popular.

- How to use the summation symbol
- Tessellation: The Mathematics of Tiling
- An extensive explanation about the Epsilon-Delta definition of limits
- The Algebraic and Geometric Proofs of Pythagorean Theorem
- Why do we reverse/flip the inequality sign?
- Using Mathematics to Win the Lottery
- Arithmetic Sequences and Linear Functions
- Rational and Irrational Numbers
- Sum of the interior angles of a polygon
- Derivation of the Quadratic Formula