Seventh root of maximum numbers calculated manually by a child in one minute
The record for manually calculating the seventh root of maximum numbers in one minute was set by Gayathry T Biju (born on February 26, 2012) of Bengaluru, Karnataka. She manually calculated the seventh root of 41 random numbers (of 8 to 14 digits) in one minute and wrote the answers on a sheet of paper (under the guidance of VMAT Academy, Bengaluru), at the age of 12 years, 11 months and 23 days, as confirmed on February 18, 2025.
