Maximum multiplication sums of random large numbers mentally calculated by a child
The record for mentally calculating the maximum number of multiplication sums of random large numbers was set by Riquil Akhil (born on June 1, 2018) of Thiruvananthapuram, Kerala. He recalled the answers of 15 multiplication sums of 15 random large numbers (with different multipliers) in 2 minutes and 23 seconds, on hearing the sums, wherein the answers ranged from 4 million to 121 decillion, at the age of 7 years, 7 months and 19 days, as confirmed on January 20, 2026.
