Aditi Singhal is an international memory trainer, author, motivational speaker, counsellor and Vedic Math expert par excellence. She has to her credit the Guinness World Record for conducting the largest maths class and three national records for memory and fastest calculation awarded by the Limca Book of Records. She has also been given 'The Best Memory Trainer' award by the India Book of Records. Sudhir Singhal is a dynamic trainer, author, motivational speaker and counsellor. 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.