N.K. Harish Raj (born on 27th June 2003) from Tamil Nadu, India has created a record by calculating 100 sums within five minutes on 13th November 2011 at Zion Matriculation School, Sembakkam, Chennai.
Unique ID: 2014MMW099
Master M. Justin (born on 7th June 1979) founder of Bright Group of Academies, Manali, Kan...