Drill mode
Operators
Add / sub ranges
Operand A
to
Operand B
to
Subtraction reverses an addition: A sets the answer and B the number subtracted, so the first number shown reaches 200.
Mul / div ranges
Operand A
to
Operand B
to
Division reverses a multiplication: A sets the divisor and B the answer, so the dividend shown reaches 1200.
Game type
Input mode
Discipline mode
Simulates real OA conditions — wrong answers lock in, backspace is penalized or blocked.