Simple Calculation

This is not your typical timed quiz. You choose the difficulty — but time is yours to control.

Answer correctly → gain more time. Answer wrong → watch time slip away.

Pick an easy mode for a relaxed pace, or jump into hell mode for heart-pounding pressure. Addition, subtraction, multiplication, and division appear randomly. Every question decides how much further you can go.

Time is both your lifeline and your reward. How long can you survive this arithmetic battle?