Sumvolt

A fast-paced mental arithmetic arcade game where every answer matters.

Solve equations as quickly as you can to keep the clock alive. Correct answers add time, while wrong answers take it away.

Build your streak, increase your multiplier, and survive as long as possible.

Features

• Fast mental arithmetic gameplay
• Increasing difficulty
• Streak multiplier
• Four answer choices
• Keyboard and mouse/touch controls
• Responsive desktop and mobile support
• Local high score

Controls

Mouse / Touch: Click or tap an answer.

Keyboard: Use keys 1–4 or the arrow keys to select an answer.

Start / Restart: Space, Enter, or R.