Dr. Ramakrishnan Vaidyanathan Ph.D.(Mech), M.Tech (Mech), B.E. (Mech)Accolades:Best Techno Faculty Award 2014 Learn from Dr RK Mathematics for XI Standard, Mathematics for XII Standard,JEE Preparation for Mathematics,Black Belt andMaster Black Belt Exam Preparation Video Lessons 500+ RegisterRegister Visitor Guidelines Please register in English language only. Subscribers willing to pay one time fee only need to registerRefer Green Belt and Yellow Belt documents hereUse contact support to get more details in mail Quiz Today Master Black Belt Blog here