Tejasri Relangi (born on February 2, 2005) of Hyderabad, Andhra Pradesh, performed fastest mathematical calculation which includes 20 multiplication sums (3 digit X 3 digit) in 4 minutes 54 seconds, 20 division sums (4 digit / 2 digit) in 8 minutes 47 seconds, 4 additions (9 digit – 10 rows) in 3 minutes 53 seconds and individual multiplication sum of 3 digit x 3 digit in just 9 seconds. She performed this unique memory feat in an event conducted by WonderKidz Arithmetika on June 9, 2012 at Press Club, Basheerbagh, Hyderabad.