Gajendra Kumar assisted by Tanmay Aggarwal & Dhruba Nandi

Mr. Gajendra Kumar, popularly known as Mathematician in education industry, left his promising career as marine engineer to pursue his hobby, i.e. teaching. After cracking the prestigious IIT JEE exam, he took admission in Asia?s largest Marine Engineering college (MERI Kolkata) and served as a marine engineer in Mitsui OSK lines and British petroleum. But it was his hunger to solve Maths and love to spread the knowledge of Maths that made him join the Education Industry. His 1st book ?Brain Gym? was published in 2008 and this is his 10th book in the Mathematics domain. He also invented famous formula to find 1st non zero digit of any factorial, named as 'Gajen's Method', and got copyright from Govt of India. At present, he is working as Academic Director of one of the premier institute in Kolkata. He has an experience of 12 years in teaching students for JEE Advanced.