টি ভিউ
0:55
Indian Abacus competition
0:57
Soroban EN
4:20
Impossible Challenge: Teenagers mentally calculate 100 3-digit numbers in seconds
1:24
Abacus Demo at Advance level by Ritwik Sinha ! Watch the effort !!
0:24
World champion in mental calculation 🏆
0:25
#superclever #superznalac #mentalarithmetic #franchise #abacuslearning #math #mostar
0:26
Finger Abacus is a mental calculation method that uses fingers to mimic an Abacus for counting
0:51
Bill Gates Vs Human Calculator
