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Once Ramanujan, who was in London, was sick.

Hardy came to visit him in a Taxi.


This was the conversation


What are Hardy Ramanujan Numbers? - Part 2

That’s a very dull number


From then on,

number 1729 is known as Hardy-Ramanujan Numbers


1729 can be expressed as

  1729 = 1 + 1728 = 1 3 + 12 3


  1729 = 729 + 1000 = 9 3 + 10 3



1729 is the smallest number that can be represented as sum of two cubes in two different ways

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.