Fastest Time to Solve 100 Two Digit Mental Arithmetic Addition Problems (2 Rows) by an Individual (Female)

Fastest Time to Solve 25 Two Digit Mental Arithmetic Multiplication Problems (2 Rows) while solving Rubik Cubes Simultaneously by an Individual (Female)

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

Fastest Time to Solve 100 Three Digit Mental Arithmetic Addition and Subtraction Problems (3 Rows) by an Individual (Female)

Fastest Time to Solve 150 Single Digit Mental Arithmetic Addition Problems (5 Rows) by an Individual (Female)

Fastest Time to Solve 100 Two Digit (First Row) Mental Arithmetic Multiplication Problems (2 Rows) by an Individual (Female)