- The Basel Problem / Zeta (2) and Wallis’s Product (VIDEO!)
- Dividing by 97 – and other such numbers (VIDEO!)
- Finding the Center of a Circle (VIDEO!)
- Standard Deviation Formula Explained! (VIDEO!)
- Dividing by Nine: Something Cute (VIDEO!)
- Viviani’s Theorem (VIDEO!)
- On Pythagoras’ Theorem (VIDEO!)
- Fundamental Theorem of Arithmetic: Proof! (VIDEO!)
- Euclidean Algorithm and Jug Filling (VIDEO!)
- Pi for a Square! (VIDEO!)