163 and Ramanujan Constant

Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers.Check out Brilliant (get 20% off their premium service): https://brillian...

Why does Alex Clark, from the University of Leicester, have a strange fascination with 163?

Some slightly more advanced stuff in this video, including the Ramanujan Constant and its use in a "famous" April Fool's joke.