The record for being the youngest kid to solve 9- digit addition and subtraction sums was set by Ayana Jain (born on March 12, 2017) of Indore, Madhya Pradesh. She accurately solved 5 addition and 5 subtraction 9-digit sums in 11 minutes and 8 minutes respectively, at the tender age of 3 years, 11 months and 13 days, as confirmed on February 25, 2021.
Youngest kid to solve 9- digit addition and subtraction sums
