Sudhir 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 Records. 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.Aditi Singhal is an international memory trainer, author, motivational speaker, counsellor and Vedic Math expert par excellence. She, along with co-author Sudhir Singhal, has to her credit the Guinness World Record for conducting the largest maths class. She has also been awarded three national records by the Limca Book of Records and been given The Best Memory Trainer award by the India Book of Records. Along with Sudhir Singhal, she has authored four bestselling books-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.