Srinivas Ramanujan by Sanjay Goyal

From childhood, Ramanujan was highly interested in mathematics. He could solve complex mathematical problems easily at a tender age of five to six years. At the age of five, he was sent to the village school to study. At school, he used to always discuss mathematics with his friends. He would ask such questions to his teachers, which were difficult to solve. He would ask about things like constellations and circumference from his teachers.
Ramanujan had a very sharp memory too. He would never forget whatever was told to him just once.