S.N. SIR, Infinity maths Classes is the best famous and top 10 maths Classes for JEE (Main & advance)/NDA/NTSE/XIth & XIIth in S K Puri, Boring road Patna, Bihar. S.N. Sir is the Most Popular and Famous maths Teacher in S. K. Puri, Boring road Patna, Bihar. It is the top 10 infinity maths Institute for IIT-JEE (Main/Advance) XIth & XIIth in Sri Krishna Puri, Boring Road, Patna, Bihar. S.N. Sir is famous for Modern Tricks and Graphical approach.