I have written a book called 'In the Wonderland of Numbers.' It's about a young girl, Neha, who is very poor in mathematics, but in a series of illusory experiences, she becomes a great mathematician.
Shakuntala DeviIf you do not use a muscle or any part of the body, it tends to become atrophic. So is the case with the brain. The more you use it, the better it becomes.
Shakuntala Devi