Maximum Single Digit Mental Arithmetic Addition Problems (5 Rows) Solved in 4 Minutes by an Individual (Male)

Maximum Single Digit Mental Arithmetic Addition Problems (3 Rows) Solved in 3 Minutes by an Individual (Male)

Maximum Single Digit Mental Arithmetic Addition Problems (4 Rows) Solved in 4 Minutes by an Individual (Female)

Fastest Time to Solve 25 Two Digit Addition and Subtraction Problems (3 Rows) using Abacus while Listening to Songs by an Individual (Female)

Maximum Single Digit Mental Arithmetic Addition and Subtraction Problems (8 Rows) Solved in 5 Minutes by an Individual (Female)

Maximum Two Digit Mental Arithmetic Multiplication Problems (2 Rows) Solved in 5 Minutes by an Individual (Female)