Recalling cumulative sum of 500 digits in least time blindfolded
The record for recalling the cumulative sum of 500 digits in the least time blindfolded was set by Atharva Uttam Gujar (born on August 12, 2012) of Mumbai, Maharashtra. He recalled the continuous addition of numbers from 1 to 500 (cumulative sum) in 9 minutes and 21 seconds using Abacus method, while being blindfolded, at the age of 8 years, 10 months and 17 days, as confirmed on June 29, 2021.