Neelakantha Bhanu Prakash, the 22-year-old Indian called the 'world's fastest human calculator' for his mental calculation, founded maths edtech startup Bhanzu in 2020. "We aim to eradicate maths phobia and encourage careers in maths and STEM fields," he said. Bhanzu, which provides experiential maths learning courses online, raised its $2 million seed round led by Lightspeed in February 2022.