What is e?

Less well known than it's popular friend, pi, e is nonetheless a very important number. Approximately equal to 2.718, Euler's number pops up in everything from finance to hats!

But what is it? Let's be curious and ask 'what is e?'

What is Pi?

Pi is a number that everyone has heard of. It is a staple of our maths education from a fairly early age. Some may recall it is approximately 3.14. That funny looking symbol, π is engraved in our minds, but what actually is it? What are the practical uses for it? And what on earth is an 'irrational number'?

Let's be curious and ask, 'what is pi?'