Maximum triangular numbers added in 30 seconds
The record for adding the maximum number of triangular numbers in 30 seconds was set by Nivaan Agarwal (born on April 25, 2016) of Pune, Maharashtra. He added the numbers from 1 to 30 in just 30 seconds at the age of 5 years, 5 months and 5 days, as confirmed on September 30, 2021.