The Department of Mathematics, Dibrugarh University has observed National Mathematics Day on 22 Dec 2016, which was the 129th Birth Anniversary of Srinivasa Ramanujan, a genius par excellence in the field of Mathematics. Students from different schools and colleges participated in the programme. In his welcome address, Prof Tazid Ali, Head of the department of Mathematics has given a brief review on the Life and Works of Ramanujan. In his keynote address Dr Mukunda Rajbongshi, Former Principal of North Lakhimpur Girls' College has beautifully orated "How to think like a Mathematician?" Dr Dipak Sarma, Former Principal of Kakojan College was also present in the event and delivered a talk on "Test of Divisibility" wherein he elaborated on Vedic Mathematics. On this occasion Essay writing competition and Extempore Speech competition were organized among school as well as College students. The event concluded with a prize distribution ceremony.