🧠 Number Memory Test
A number appears briefly, then vanishes. Type it back exactly. Each correct answer adds one digit, and one mistake ends the game.
How to play
- Press start and a 3-digit number appears. Memorize it while the bar below shrinks.
- When the number disappears, type what you remember and press Enter.
- Get it right and the next number is one digit longer (4, 5, 6…). Longer numbers stay on screen a little longer.
- One wrong answer ends the game. Your score is the longest number you got right.
| Digits | Time on screen |
|---|---|
| 3 | ≈ 2.9 s |
| 5 | ≈ 4.0 s |
| 7 | ≈ 5.1 s |
| 10 | ≈ 6.7 s |
| 12 | ≈ 7.8 s |
Tips to remember more digits
Chunking
The game shows digits in groups of three for a reason. Splitting a long number into 2–3 digit chunks lets you hold far more, the same way a US phone number is easier to remember as 555-867-5309 than as ten separate digits. Working memory can only hold a handful of items at once, so the trick is turning several digits into one "chunk."
Say it in your head
Repeating the number silently with a rhythm ("three-seven-two, five-eight-one") keeps it fresh after it disappears.
Attach meaning
Link chunks to things you already know: years (1776, 1969), ages, sports jersey numbers, or area codes. Meaningful numbers stick much better.
How to read your score
A classic finding in psychology, often summarized as "7 plus or minus 2," suggests many people start to struggle at around 7 digits on a plain digit-span task. Individual differences are large, though, and strategies like chunking can push you well past that. This is a game, so compare yourself with yesterday rather than reading too much into a single number.
This game is not a memory assessment or a medical test. Your best score is stored only in this browser's cookies.