This video has been organised to tell people about Hardy Ramanujan Number i.e. 1729. This number is the smallest number which can be expressed as the sum of two positive cubes. 1729 = 12^3+1^3 = 10^3+9^3 The number derives its name from the following story G. H. Hardy told about Ramanujan. "Once, in the taxi from London, Hardy noticed its number, 1729. He must have thought about it a little because he entered the room where Ramanujan lay in bed and, with scarcely a hello, blurted out his disappointment with it. It was, he declared, 'rather a dull number,' adding that he hoped that wasn't a bad omen. 'No, Hardy,' said Ramanujan, 'it is a very interesting number. It is the smallest number expressible as the sum of two [positive] cubes in two different ways'. 1729 is known as the second taxicab number as it derives its name from a story starting from that taxi cab. #Ramanujan , #ramanujanmathematician , #ramanujanmovie , #ramanujanbiography , #ramanujanbiography , #ramanujannumber , #ramanujaninfiniteseries , #SrinivasaRamanujan , #themanwhoknewinfinity Ramanujan mathematician Srinivasa Ramanujan Ramanujan infinite sum proof Srinivasa Ramanujan biography documentary on Srinivasa Ramanujan the man who knew infinity Ramanujan sum to infinity 1+2+3...=-1/12 mathematician day 22 December Ramanujan movie Srinivasa Ramanujan movie in hindi Ramanujan all theorems Ramanujan number Ramanujan magic square Ramanujan proofs Ramanujan theory story of Srinivasa Ramanujan Ramanujan and infinity Riemann hypothesis ramanujan -------------------------------------------------------------------- maths riddles & puzzles :-   • Math Riddles 📈   -------------------------------------------------------------------- Videos on Conic Section:-    • Conic Section   --------------------------------------------------------------------- Optics class 12 derivations:-   • Light class 12 derivations   ---------------------------------------------------------------------- proof of mensuration formula's:-   • Mensuration formula proofs   ----------------------------------------------------------------------- Vedic maths tricks :-https://www.youtube.com/watch?v=9B4I6xvjL-A #ramanujan