Rapid addition & subtraction of hundred single digit numbers by a kid
The record for performing the rapid addition & subtraction of 100 single digit numbers was set by Tanvi Sharma (born on August 28, 2014) of Delhi Cantonment, Delhi. She rapidly added and subtracted 100 single digit numbers flashing on the screen (with a speed of 0.3 seconds) in 32.56 seconds at the age of 6 years, 11 months and 22 days, as confirmed on August 19, 2021.