Rajesh Kumar Thakur is a mathematics teacher by profession and also a popular mathematics writer. He has been the Honorary Secretary and Chairman of the Award Selection Committee of All India Ramanujan Maths Club (AIRMC) since 2012. Widely published, with more than 57 books, 67 e-books, and 350 blogs to his credit, Thakur is a regular columnist with over 500 published articles in various well-known newspapers and magazines including Amar Ujala, Prabhat Khabar and Navbharat Times. A number-lover, Thakur is the recipient of several awards, including the National Best Teacher Award (2010), the Arvind Pandey Yuva Lekhan Award (2015), the Math Genius Award (2017) and the Global Teacher Award (2018). He lives in Delhi, India. You can contact him at rkthakur1974@gmail.com. His Twitter handle is @R_K_THAKUR.