30s Math: 30-Second Mental Math Game

30s Math is a free online mental math game. Solve as many arithmetic problems as possible in 30 seconds across four difficulty levels.

How to play

Choose a difficulty level, start the timer, and answer each problem as quickly and accurately as possible. One wrong answer ends the run, so stay focused and try to beat your best score.

Choose your difficulty

Easy — small numbers and one-step operations.
Normal — two-step expressions and mixed values.
Hard — larger numbers and mixed operations.
Expert — multi-step and advanced math problems.

Play in your browser

No installation or account is required. Your personal best is saved locally, and you can optionally submit a score to the daily and all-time online leaderboards.

Play in Korean