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Number Memory

Remember the number as it gets one digit longer each round. What is your level?

  • 🧠 Brain Game
  • ✓ Free
  • ✓ No sign-up
  • ✓ Private — runs in your browser
  • ✓ Any device
🔢

Number Memory

A number flashes on screen. It disappears — then you type it back. Get it right and it grows by one digit. One slip ends the run.

The average person tops out around 7 digits.

Best: · press Enter to start

Level
Digits
Best
★ New best! ★
You remembered
digits
you typed
Best:

Press Enter to play again

Why you’ll love Number Memory

Instant & freeNo signup, no paywall, no limits — Number Memory works the moment the page loads.
Completely privateEverything runs in your browser. Nothing you enter is ever uploaded or stored on a server.
Works on any deviceFully responsive and touch-friendly — use it on your phone, tablet or desktop.
Beat your bestYour scores and streaks save locally — come back to beat them.

How to use it

  1. 01

    Open it

    No download and no login — the tool is ready right at the top of this page.

  2. 02

    Use it

    Enter your details or start interacting. Everything updates live as you go.

  3. 03

    Get your result

    Copy, download or share your result in a single tap. That’s it.

About Number Memory

Number Memory is the classic digit span test: a number flashes on screen, disappears, and you type it back from memory. Get it right and the next number is one digit longer; one slip ends the run. Your score is the number of digits you successfully held in your head.

Digit span is one of the oldest measures in cognitive psychology — versions of it have been used since the 1880s, and it still appears in the Wechsler intelligence scales today. It measures short-term memory capacity, famously summarised by George Miller as "the magical number seven, plus or minus two". Most adults top out around 7 digits forward, which is exactly where the average player lands here.

This version also includes reverse mode — the backwards digit span test — where you type the digits in reverse order. That is a genuinely harder task, because you have to hold the number and mentally manipulate it at the same time, which is why backward spans typically run about two digits shorter than forward spans.

The display time scales with difficulty: roughly a second for the first digit plus about 0.7 seconds per extra digit, capped at seven seconds, so long numbers never give you unlimited reading time. Your best score is saved separately for each mode in your browser, and nothing you type is ever sent anywhere.

Popular uses

  • ✦ Test your digit span and compare against the 7-digit human average
  • ✦ Practise chunking and rhythm techniques for remembering phone numbers and codes
  • ✦ Use reverse mode as a quick working-memory workout before deep-focus work
  • ✦ Demonstrate Miller's 7±2 rule in a psychology class or study group
  • ✦ Challenge friends with the share button and settle who has the longest span

Frequently asked questions

What is a good number memory score?
The average adult recalls about 7 digits forward — Miller's famous "seven, plus or minus two". Reaching 9 digits puts you clearly above average, 11+ is rare, and forward spans of 14 or more are exceptional territory usually reached only with memory techniques. In reverse mode, expect your score to drop by roughly two digits; that is normal.
Why is reverse mode so much harder than forward mode?
Forward digit span mainly tests storage: you hold the digits and replay them. Backwards digit span adds manipulation — you must keep the whole number in mind while mentally flipping its order, which loads the working-memory "executive" much harder. That extra demand is why the backwards version is used clinically as a working-memory measure, and why most people score about two digits lower on it.
How can I remember longer numbers?
Chunking is the single biggest upgrade: instead of nine separate digits, hold three groups of three, the way you naturally remember a phone number. Saying the chunks with a rhythm helps too, as does attaching meaning — a year, an age, a familiar area code. Memory athletes extend this into full digit-to-image systems, which is how spans of 50+ digits become possible.
How long is the number shown on screen?
The reveal time grows with the number: about one second at level 1, plus roughly 0.7 seconds for each additional digit, capped at seven seconds. A shrinking bar shows how long you have left. The cap matters — at 10+ digits you no longer get proportionally more reading time, so an efficient chunking strategy beats slow re-reading.
Is Number Memory free to use?
Number Memory is 100% free — no signup, no watermarks and no usage limits. It’s one of 200+ free tools we build and give away.
Are my scores saved?
Yes — your best scores and streaks are stored in your browser, ready when you return. Most also let you share your result.

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