Maggi Ajjayya, Kottur’s “Computer Man,” amazes social media with lightning-fast mental math. Despite only studying till 8th grade and surviving by begging, his calculation tricks have gone viral.

A 14-year-old Indian math prodigy known as the "Human Calculator" says yoga meditation keeps his brain nimble. Aaryan Shukla, of Maharashtra, India, recently broke six world records in math in one day ...