About Number Memory Test
The Number Memory Test is a free online digit span test: a number flashes on screen, disappears, and you type it back from memory. Start with a single digit and add one more every round — how long a number can you hold in your head?
This is one of the oldest and simplest ways to measure working memory, the short-term "mental notepad" you use to remember a phone number or a verification code for a few seconds. Psychologists have used digit span tasks for over a century, and the famous idea that people can hold about "seven, plus or minus two" items comes from exactly this kind of test.
Our version shows big, clear digits with a draining timer bar, works with your keyboard or an on-screen number pad, and compares your result with typical players on an approximate bell curve. It takes a minute or two, it's free, and you'll want to beat your score immediately.
How to play Number Memory
- 1
Start the test
Press Start test (or Enter). Level 1 shows a single digit. The bar under the number shows how much viewing time is left.
- 2
Memorize the number
Each number stays visible for 1 second plus 0.6 seconds per digit — so 5 digits get 4 seconds and 10 digits get 7 seconds. If you're ready early, press I'm ready or Enter to skip ahead.
- 3
Type it back
When the number disappears, type it with your keyboard or the on-screen pad, then press Enter or the check button. Backspace fixes typos before you submit.
- 4
Go as far as you can
A correct answer moves you to the next level with one more digit. The first wrong answer ends the test and shows your number next to your answer, with any wrong digits highlighted, plus how you compare with typical players.
Controls
| Input | Action |
|---|---|
| 0–9 | Type digits (top row or number pad) |
| Backspace | Delete the last digit |
| Enter | Submit, continue, or start a new test |
| On-screen pad | Type and submit on touch screens |
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Number Memory tips and strategy
Chunk the digits
Split long numbers into groups of two or three, like a phone number: 58 204 917 is far easier to hold than 58204917. This one habit can add several digits to your score.
Say it in your head
Silently repeat the number, in its chunks, until you type it. This "rehearsal" keeps the digits active in memory. Saying "fifty-eight, two-oh-four" packs more into each sound than single digits.
Look for patterns
Repeats, runs and familiar numbers are memory anchors: a 1984, a 747 or a 3-3-3 can turn three digits into one idea.
Type immediately
Memory fades quickly. As soon as the number disappears, start typing — don't pause to double-check what you think it was.
Use the full viewing time on long numbers
Skipping ahead is fine for short numbers, but once you're past 7 or 8 digits, use every moment of the timer to rehearse your chunks.
Test yourself when you're fresh
Tiredness, noise and distractions noticeably lower digit span. For your best score, play in a quiet moment and keep your eyes on the screen.
What is a good digit span?
Most adults can reliably recall around 7 digits, and results typically fall somewhere between 5 and 9. Getting past 10 usually means you are using a strategy such as chunking, and scores in the teens take practice and focus.
At the end of each test we show where your score falls on an approximate bell curve centered on 7 digits. It is a fun reference point, not a clinical or diagnostic measurement — real neuropsychological tests use standardized conditions and published norms.
How the test works
Every level shows a random number with one more digit than the last (the first digit is never zero). The number stays visible for 1 + 0.6 × digits seconds, then you type it back. Your score is the number of digits in the last number you recalled correctly — if you get 8 digits right and miss on 9, your score is 8.
Scores are ranked on the global leaderboard, and your personal best is saved on your device.
Digit span and working memory
Digit span tests have been part of intelligence and memory assessments since the late 1800s, and they remain a common way to look at short-term and working memory. In 1956 psychologist George A. Miller published his well-known paper "The Magical Number Seven, Plus or Minus Two," which described how limited our short-term memory is — and how grouping information into chunks helps us work around that limit.
If you enjoy this test, try Simon Says for sequence memory, Memory Match for visual and spatial recall, or Reaction Time to test your speed. See all of our memory games and brain training games.
Frequently asked questions
What is the average score on a number memory test?
Around 7 digits is typical for adults, with most people scoring between 5 and 9. Using chunking and rehearsal strategies can push your score higher.
What is a digit span test?
A digit span test measures how many digits you can hold in short-term memory and repeat back. It is one of the most widely used tasks for studying working memory.
How is my percentile calculated?
We compare your score with an approximate normal distribution of typical results, centered on 7 digits. It gives a rough sense of how you compare with most people, but it isn't based on a clinical sample.
How long is each number shown?
Each number is displayed for 1 second plus 0.6 seconds per digit, so a 7-digit number stays up for 5.2 seconds. You can skip ahead early if you're ready.
Can you improve your number memory?
Yes. Strategies like chunking digits into groups, silent rehearsal and spotting patterns make a real difference to your score. Practice helps you use those strategies faster.
Can I play on my phone?
Yes. On touch screens use the built-in number pad below the game — it's designed so your phone's keyboard doesn't cover the screen.
Is the number memory test free?
Yes — it's completely free, with no download or account required, and it works in any modern browser.