Aryabhata was the first in the line of great mathematician-astronomers from the classical age of Indian mathematics and Indian astronomy. His works include the Aryabhaṭīya (499 CE, when he was 23 years old) and the Arya-siddhanta.
The works of Aryabhata dealt with mainly mathematics and astronomy. He also worked on the approximation for pi.
he went to Kusumapura for advanced studies and lived there for some time. Both Hindu and Buddhist tradition, as well as Bhaskara I (CE 629), identify Kusumapura as Pāṭaliputra, modern Patna.