At a 20-student class held from around 4 p.m. most of the kids ... the abacus became a compulsory subject at elementary schools in Japan in 1935. Today, soroban lessons are included in math ...

A four-year-old girl named Siyah from Tamil Nadu has gone viral for her exceptional math skills, solving 59 sums in 15 minutes using the Abacus technique. She has entered the India Book of Records and ...