Maximum Three Digit Mental Arithmetic Division Problems (2 Rows) Solved in 5 Minutes by an Individual (Male)

Fastest Time to Repeatedly Subtract a Single Digit Number 100 times from a Larger Number by an Individual (Male)

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

Fastest Time to Solve 100 Single Digit Addition Problems (4 Rows) using Abacus by an Individual (Male)

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

Maximum Single Digit Mental Arithmetic Addition Problems (5 Rows) Solved in 7 Minutes by an Individual (Female)