Sudhir SinghalSudhir Singhal is a dynamic trainer, author, motivational speaker and counsellor. Along with co-author Aditi Singhal, he has to his credit the Guinness World Record for conducting the largest maths class and a world record in the Limca Book of Recrds. He has over fifteen years' experience in different fields like technology, programming, management and education. Aditi Singhal and Sudhir Singhal have authored four bestselling books together-How to Memorize Anything, How to Become a Human Calculator, How to Be a Math Magician (a flip book) and The Ultimate Memory Handbook for Students. Read More Read Less