Who is Neelakanta Prakash, the 20-year-old named fastest human calculator?

Hyderabad's 20-year-old Neelakanta Bhanu Prakash has won 'fastest human calculator' title after winning the gold medal in Mental Calculation World Championship at Mind Sports Olympiad in London. In 2005, he suffered an accident that left him bed-ridden for a year, when he began solving math problems. He's now a graduate with a degree in Maths from Delhi's St Stephen's College.