What IS a Number? As Explained by a Mathematician
1:20:16
Defining Every Number Ever
37:44
How to Count
14:43
What Actually Is A Number?
29:37
Why is This Curve Called "The Witch"?
28:28
Russell's Paradox - a simple explanation of a profound problem
14:41
Seven Dimensions
15:21
Why π^π^π^π could be an integer (for all we know!).
11:21