Free math speed game
Mental Math Speed Test
Solve as many arithmetic problems as you can before the clock runs out. Type the answer and it advances instantly — no Enter, no friction. Pick your operations and difficulty, then see how you rank, from Warming Up to Math Genius. No sign-up, instant result.
Set up your sprint
What is a good mental math score?
On the default Medium sprint (all four operations, addition to 100, multiplication tables to 12), most people solve around 15–25 problems in 120 seconds on their first try. Regular players comfortably pass 40, and trained speed-arithmetic players clear 80 or more. Scores scale with practice faster than almost any other cognitive skill — daily one-minute sprints for a couple of weeks typically double a first score. Compare like with like: a 60-second Easy sprint and a 120-second Hard sprint are different games, which is why your percentile is computed per duration and difficulty.
How it works
- Pick a difficulty preset (or toggle individual operations), choose 60 or 120 seconds, and start the sprint.
- One problem shows at a time. Type the answer — the moment it's correct, the next problem appears automatically.
- Made a slip? Just keep typing or backspace; wrong digits never advance. Pressing Enter on a wrong answer counts as a miss and clears the field.
- Stuck? Hit Skip (or press Escape) to jump to the next problem — it costs 5 seconds of your clock and breaks your streak, so it's a rescue, not a strategy.
- When the timer hits zero you get your score, accuracy, average seconds per problem, best streak, percentile, and tier — plus a challenge link for your friends.
How scoring works
Your headline score is simply the number of problems you solved before the timer ran out. Behind it we track attempts (including wrong Enter presses), accuracy, skips (each skip costs 5 seconds of clock time and your streak), average solving time, and your best streak of correct answers in a row. The percentile compares your score against typical results for the same sprint length and difficulty — solving 40 problems on a 120-second Medium sprint beats roughly 70% of players. The tier ladder is a fun label on top of the same curve; it is an estimate for practice and bragging rights, not a standardized math assessment.
Score benchmarks (120s · Medium)
Rough guide for the default sprint. Halve the numbers for a 60-second run.
| Problems solved | Level |
|---|---|
| under 15 | Warming up — a few sprints in, this rises fast |
| 15–30 | Typical first-time range |
| 30–45 | Sharp — better than most casual players |
| 45–60 | Lightning — top ~10% |
| 60–80 | Human calculator — top ~4% |
| 80+ | Math genius — top 1% territory |
How to get a higher score
- Don't verify — trust your hands. Reading the next problem while typing the last digit is where the real speed comes from.
- Break numbers apart: 47 + 38 is 47 + 40 − 2. Left-to-right beats the school column method for speed.
- For division, think multiplication: 91 ÷ 7 asks "7 times what is 91?"
- Master the 11–19 times tables and squares to 20 — they cover a surprising share of Hard-mode problems.
- Short daily sprints beat long sessions. One or two 60-second runs a day compound quickly.
- Type on the device you'll compete on: a physical numpad is faster than a phone keypad, so challenge friends on equal gear.
What is a good mental math test score?
On the default 120-second Medium sprint, 15–25 solved is a typical first score, 40+ beats about 70% of players, 60+ is top-10% territory, and 80+ is elite. Easy and Hard presets and 60-second sprints have their own curves.
Is the BrainRank Mental Math Test free?
Yes. Every sprint, your score, percentile, tier, and the shareable challenge link are free — no payment, no account, no email.
Do I need to press Enter after each answer?
No. The field checks as you type and advances the instant your answer is correct — that's what makes the sprint feel fast. Enter also works if you prefer it, but submitting a wrong answer counts as a miss.
Can I skip a problem I'm stuck on?
Yes — hit the Skip button or press Escape and the next problem appears immediately. Skipping costs 5 seconds of your clock and resets your streak, so it's there to rescue you when you're stuck, not to farm easier problems.
Does practicing mental math actually help?
Yes — speed arithmetic is one of the most trainable skills there is. Most people can double their first score within two weeks of short daily sprints, and quick number sense carries over to everyday estimates, shopping, and work.
Why are all the answers whole numbers?
Every problem is generated so the answer is a whole number — division problems are built as the inverse of a multiplication, so they always divide evenly. That keeps the sprint about speed, not decimals.
How do challenge links work?
Your result screen builds a link that carries your score, sprint length, and difficulty. Anyone who opens it plays the same setup against your number and instantly sees whether they beat you.
The Mental Math Speed Test is a free practice and training game for curiosity and fun. It is not a clinical assessment, an academic placement exam, or a standardized measure of mathematical ability.