Fastest teen to solve a 7-digit by 7-digit multiplication sum using Abacus and speed math techniques
The record for being the fastest to solve a 7-digit by 7-digit multiplication sum using Abacus and speed math techniques was set by Ajay Kannaa R. (born on November 16, 2010) of Tiruchirappalli, Tamil Nadu. He solved a 7-digit by 7-digit multiplication sum on a sheet of paper in 1 minute and 17 seconds, deriving the correct answer of 73,19,74,95,14,144, using Abacus and speed math techniques, at the age of 14 years, 6 months and 13 days, as confirmed on May 29, 2025.
