Math Sprint
Sixty seconds of mental arithmetic that gets harder as you get further.
One minute, as many correct answers as you can manage. It opens with two-digit addition and subtraction, moves into multiplication once you have a few right, and then mixes everything together — so the questions you face at forty seconds are not the ones you faced at five.
Every question is generated when you reach it rather than pulled from a stored list, which means a second run is genuinely a second run. You cannot memorise your way to a better number, and there is nothing to look up.
It is built for a thumb. The keypad sits low on the screen where your hand already is, a wrong answer clears immediately rather than stopping you to explain itself, and the next question is already there. If you are on a laptop, the number keys and Enter do the same job.
How it works
- Sixty seconds on the clock, starting from the first question.
- Type your answer on the keypad or with your keyboard, then submit — Enter works too.
- Difficulty steps up as your correct answers accumulate: addition and subtraction first, then multiplication, then both.
- At the end you get how many you got right, your accuracy, and your fastest single answer.
Common questions
- How does the difficulty increase?
- It steps up as your correct answers accumulate rather than as the clock runs down, so the run adapts to you. It opens with two-digit addition and subtraction, brings in multiplication after the first few land, and then mixes all of them with larger operands. Someone answering quickly will see harder questions at the thirty-second mark than someone taking their time — which is the point, since a fixed difficulty curve is either too easy at the end or too hard at the start.
- Why is there no leaderboard or percentile?
- Because there is no server here to hold one. Nothing you do on this page is transmitted anywhere, which means we have no scores to rank you against, and a "top 8%" badge would be a number we invented. Plenty of sites show one anyway. We would rather give you your own previous number to beat, which is the only comparison that was ever real.
- Can I use a keyboard instead of the keypad?
- Yes. Number keys type digits, Enter submits, Backspace deletes the last digit, and Escape clears the field. The on-screen keypad and the keyboard stay in sync, so you can switch between them mid-run without losing anything. The whole test is completable without a mouse.
- What happens if I get one wrong?
- It counts against your accuracy and the next question appears immediately. There is no penalty beyond the seconds you spent, and nothing stops to tell you off — a modal explaining your mistake would cost you more time than the mistake did. Your accuracy figure at the end is what tells you whether you were pushing too hard.
- Is my score saved?
- No. Nothing is written to your device and nothing is sent to us; close the tab and the run is gone. If you want to keep a result, the share button encodes the numbers into a link you can copy — that link is made in your browser and goes only where you send it.
This measures arithmetic speed under time pressure on one particular minute, which is a narrower thing than it feels like while you are doing it. Tiredness, the hand you are holding your phone in, and whether you have done this before all move the number more than anything about you does. There is no leaderboard and no percentile here, because there is no server collecting scores — any ranking we showed you would be made up.