The REAL Answer To The Viral Chinese Math Problem "How Old Is The Captain?"
Presh Talwalkar emphasizes clarity in his speaking voice over smoothness which means listening to him is not as pleasant as it could be, but then there shouldn't be any confusion over what he is saying, which is kind of important when you are dealing with something as persnickety as math.
He must have a zillion videos up on YouTube. Most of them are straight up math problems. This is the first one I have encountered that veers off into psychology. The math problems that he posts range from trivial to esoteric. I like the mid-range ones, though I am sometimes mistaken in my initial impression and find after working on it for a few minutes that I am not going to be able to solve it without digging up some obscure mathematical knowledge.