I am(Y.srinivasarao) professional lecturer working since 20 years and i secured the India Book of Records, I can able to teach brain speed mathematics in short cuts ways and Get as many correct answers as possible within the given time limit. I had a knowledge to solve Unanswered questions with in a short period. I am giving lecture and creating awareness video and analysing videos on this channel with my passion.if any watching my channel please subscribe ,like,share it