Maximum addition sums of three digits with three digits solved in 5 minutes by a child
The record for solving the maximum number of addition sums of three digits with three digits in 5 minutes was set by R. Hasini (born on May 8, 2013) of Kancheepuram, Tamil Nadu. She correctly solved 111 addition sums of three digits with three digits in 5 minutes using the Abacus and speed math techniques, at the age of 12 years, 1 month and 3 days, as confirmed on June 11, 2025.
