Math Sprint
A timed mental arithmetic game — pick your operations and difficulty, play solo or pass the device around for turns.
What do you want to practise?
Press Enter to submit. Answers are checked as soon as they can only be right or wrong.
How the score works
Your score is correct answers per minute multiplied by your accuracy. Speed on its own would reward hammering a key until something is right, and the accuracy multiplier is what stops that being a winning strategy — a player who answers four times as fast at a tenth of the accuracy scores far worse, not better.
In pass-and-play, every player gets exactly the same questions in the same order. It is the only way a turn-based comparison means anything, and it is worth knowing that the second player is not getting an easier set.
Things worth knowing
- Division questions are built from their own answer, so they always come out whole. No remainders and no decimals — the point is arithmetic, not long division.
- Subtraction is built from the answer upward, so it never goes negative unless you switch that on. A beginner meeting "4 − 9" learns only that the game is broken.
- The score is correct answers per minute multiplied by accuracy. Speed on its own would reward mashing a key, and the multiplier is what stops that being a winning strategy.
- In pass-and-play, every player faces exactly the same questions in the same order. It is the only way a turn-based comparison means anything.
- Mental arithmetic is a trained skill and it decays. Two minutes a day beats an hour once a month, and the difference shows up within a fortnight.
- Doubling and halving beats memorising. 17 × 6 is easier as 17 × 3 doubled, and most awkward multiplications have a route like that if you look for one.
How to use
- Tick the operations you want — addition, subtraction, multiplication, division, or any mix.
- Pick a difficulty and a time limit, and choose up to four players.
- Type answers and press Enter. Everyone gets the same questions in the same order.
Frequently asked questions
How is the score calculated?
Correct answers per minute multiplied by your accuracy. Speed alone would reward hammering a key until something is right — the accuracy multiplier is what stops that being a winning strategy.
Can two people play?
Yes, up to four, passing the device between turns. Every player faces exactly the same questions in the same order, which is the only way a turn-based comparison means anything.
Do the division questions come out evenly?
Always. They are generated from their own answer and multiplied up, so there are never remainders or decimals. The point is arithmetic, not long division.
Will subtraction give me negative answers?
Only if you switch that on. By default subtraction is built upward from its answer so it never goes below zero, because a beginner meeting "4 − 9" learns only that the game is broken.
What difficulty should I pick?
Medium is the full times tables and two-digit addition, which is where most adults sit. Easy is single digits for a warm-up or a young player, and Brutal is three-digit sums and tables to twenty — expect to feel slow, because everyone does.
Do I have to press Enter?
Not usually. The answer submits as soon as what you have typed is long enough to be judged, which keeps the pace up. Enter always works too.
How often should I practise?
Mental arithmetic is a trained skill and it decays. Two minutes a day beats an hour once a month, and the difference shows up within a fortnight.
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