She is the youngest broadcaster ever seen. Elaina SmithĪ straight-talking schoolgirl, Elaina Smith became Britain’s youngest agony aunt – at just seven years old. Her name is also added in the Limca Book of World Records as well as the Guinness Book of World Records. She is the winner of “Pogo Amazing Kids Awards 2010” in genius category. She is the only participant who has done 100% accuracy in Addition, Multiplication, Square Root till date in all five Mental Calculation World Cups. At the age of 11, she was the youngest participant of the Mental Calculation World Cup 2010 and won the overall title. She started mental calculation at the age of six. Priyanshi Somani is a mental calculator from India.