Srinivasa Ramanujan FRS was an Indian mathematician and autodidact who, with almost no formal training in pure mathematics, made extraordinary contributions to mathematical analysis, number theory, infinite series, and continued fractions.

Ramanujan discovered 1729 as a magic number. Why is 1729 is a magic number ?

1729 is the smallest number expressible as the sum of two cubes in two different ways –

1^3 + 12^3 = 1729

9^3 + 10^3 = 1729

Absolutely correct, Anant.

You are today’s winner.