Mini Games
Number Memory Test
Memorize the number that flashes on screen, then type it back. Get it right and it grows one digit longer.
How to play
- A number flashes on screen — the longer it is, the longer it stays. Memorize every digit.
- When it disappears, type the number and press Enter or Confirm.
- Get it right and the next number gains a digit. One mistake ends the run — your score is the longest number you recalled.
My Best
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Can you reach the Mind Palace rank?
Ranking
| Rank | Nickname | Score |
|---|---|---|
| Rank | Nickname | Score |
|---|---|---|
- |  You | - |
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Number Memory Test comes down to one question: how long a number can you hold in your head after a single glance? It starts with a one-digit number. While the number is on screen a bar runs down, and as soon as it disappears you type exactly what you saw. Get it right and the next number is one digit longer; get a single digit wrong and the run is over.
The display time grows with the number: 0.8 seconds plus 0.3 seconds per digit, so a 7-digit number stays up for about 2.9 seconds and a 10-digit number for 3.8 seconds. Your score is the longest number you entered correctly, and it comes with a grade: 6–7 digits is Steady Memory, 8–9 Sharp Recall, 10–11 Photographic and 12 or more Mind Palace.
The format borrows from the digit span task psychologists use to study short-term memory, but this is a timed, on-screen game, not a clinical assessment. The figure people usually quote is George Miller's "magical number seven, plus or minus two." To get past it, try chunking: split the number into groups of two or three digits, the way you'd read out a phone number.
If you'd rather practice at a fixed pace, Number Recall shows every number for exactly 3 seconds. Your best Number Memory Test score goes on the global ranking, and a challenge link lets friends try to beat it under the same rules.
Frequently Asked Questions
Q. How does the Number Memory Test work?
A. You see a number for a moment, then type it back from memory. It starts at 1 digit, each correct answer adds one more digit, and a single mistake ends the run.
Q. How long is each number shown?
A. 0.8 seconds plus 0.3 seconds per digit — about 2.9 seconds for a 7-digit number and 3.8 seconds for a 10-digit number.
Q. What counts as a good score?
A. Your score is the longest number you entered correctly. 8–9 digits earns Sharp Recall, 10–11 digits Photographic, and 12 or more Mind Palace.
Q. How many digits can the average person remember?
A. The commonly quoted figure is about 7, plus or minus 2, from George Miller's 1956 paper on short-term memory. Grouping digits into chunks of two or three usually helps you go further.