Game rules · Mental arithmetic
Quick Maths
Seeded arithmetic, ramping from warm-up sums to two-digit work. Speed and streaks decide it.
The run
How it plays
- A wrong answer costs points but the problem stays — beat it or burn the clock.
- Eight seconds per problem before it counts as a timeout.
- Both players get the identical problem list. Fully keyboard-accessible.
Mental arithmetic · 60s runs
Scoring formula · versioned
Every point, accounted for
Integer arithmetic only — the same result on every device, every time. Changing any number creates a new scoring version; old results never change.
| Component | Condition | Points |
|---|---|---|
| Correct answer | base | +60 |
| Speed bonus | under 4s / 2.5s / 1.5s | +10 / +25 / +40 |
| Streak multiplier | +5% per consecutive solve, cap +50% | ×1.00–1.50 |
| Wrong answer | problem stays, streak resets | −30 |
| Timeout | 8s without a correct answer | −20 |
Fairness
Chance never picks the winner
The challenge is sealed and identical for both players — variety without advantage. Every official score is replayed and verified on the server.
Deterministic challengesServer-replayed scoresNo random tie-breaks