Number Sprint is a 60-second mental-math run. Each question shows one expression and four answer buttons. Correct answers add points; wrong answers do not subtract points, but they still spend time.
How a run works
- Press Start. The 60-second timer begins and the first question appears.
- Choose one of the four answers. You get one attempt per question.
- After you answer, a short correct/incorrect flash appears (about 400 ms), then the next question loads. The timer keeps running during that flash.
- When time reaches zero, input locks and the result screen shows your score.
Your personal best is the highest score. Each correct answer is worth 10 points, so scores are always multiples of 10.
Difficulty tiers
Difficulty rises with how many questions you have answered correctly in the current run — not with clock time, and not downward after mistakes:
| Correct answers so far | Operators | Add/subtract ranges | Multiplication ranges |
|---|---|---|---|
| 0–4 | + and − |
0–20 | none |
| 5–9 | +, −, and × |
0–50 | 2–10 |
| 10+ | +, −, and × |
0–100 | 2–12 |
Subtraction always yields a non-negative result. There is no division in the first release.
Reading the result screen
- Score is correct answers × 10.
- Accuracy is correct ÷ answered, shown as a whole-number percent. If you answered nothing, the game shows No answers instead of a fake 0%.
- Leaving the tab does not cancel Number Sprint. Real time still counts down. If the deadline passed while you were away, the run ends and a completed score can still update your personal best.
Practical tips
- Scan for impossible options first. Wrong answers are nearby integers, so extreme values are often easy to reject.
- For multiplication, estimate products before checking every button. Narrowing to two candidates is usually enough.
- Do not hold Enter or Space on an answer button. The game ignores key repeat so one held key cannot auto-submit later questions.
- Speed matters, but a wrong tap only wastes the flash delay — still prefer a quick eliminate-and-confirm over random guessing once multiplication appears.
Open Number Sprint when you want a timed practice run.