Do you have the knowledge? Do you have the knowledge? Around 1919, the British mathematician G. H. Hardy hopped on a London cab on his way to visit his Indian colleague Srinivasa Ramanujan. The cab’s licence number, 1729, seemed dull to Hardy but his pal fervently disagreed. “It is a very interesting number,” said Ramanujan. “It is the smallest number expressible as the sum of two cubes in two different ways.” 1729 = 1 3 + 12 3 = 9 3 + 10 3 Hardy’s anecdote is one of the most well-told in