Notes: The National Mathematics Day (NMD) is celebrated every year in India on December 22 to commemorate the birth anniversary of great mathematical genius Srinivasa Ramanujan and to recognize his contribution to mathematics. It was in 2012 that then Prime Minister Dr Manmohan Singh declared December 22 as National Mathematics Day. In 1917, Ramanujan was elected to be a member of the London Mathematical Society. In 1918 he also became a Fellow of the Royal Society, becoming the youngest person to achieve the feat. He passed away on April 6, 1920.