"onederful" numbers

two functional equations from the IMO

one of the most beautiful techniques

Something Strange Happens When You Keep Squaring

a surprising exponential closure

Introduction to fluidT3D

How Imaginary Numbers Were Invented

a super nice problem

on the product of all natural numbers...

Algebra For Beginners - Basic Introduction

a twist on a classic circle problem

The Riemann Hypothesis, Explained

The Oldest Unsolved Problem in Math

a very nice functional/differential equation

a heroic use of the complex numbers

Pre-Algebra Final Exam Review

Factorio: SPACE AGE EXPANSION! - Ep 25

probably a Putnam probability problem

How to Take the Factorial of Any Number

A Proof That The Square Root of Two Is Irrational

1995 British Mathematics Olympiad problem