Mental Math Trainer — Percentages, Fractions, Squares
Friendly, private practice. No accounts. Press Enter to submit, Esc to skip.
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Press Start to begin.
Correct0
Accuracy—
Streak0
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Tips
- Press Enter to submit, Esc to skip.
- Decimals allow a small rounding tolerance (±0.01).
- Use “Daily Seed” to get a repeatable set for the day.
FAQ
What shows up in each topic?
Percentages: “What is a% of b?” (clean numbers on Easy).
Fractions: “What is a/b of n?” (chosen to land on integers by default).
Squares: “n2 = ?” (range grows with difficulty).
Is my data uploaded?
No. The trainer runs entirely in your browser. Bests and settings are stored locally.