MotionShine01 / Show
Time depends on length
The number shows for 0.9 seconds plus 0.4 seconds for every digit, then a bar runs down and it hides.
Free tool
Number memory test, how many digits can you hold?
A number shows for a few seconds, then hides, and you type it back. Start at 3 digits; each right answer adds a digit. You have two chances, and you pick how long the number shows. Your best and last ten games are kept in this browser. A game for fun, not a clinical test.
Your scores are saved in this browser. Nothing is sent anywhere. A game for fun, not a clinical or medical test.
The rules
Look, hide, type it back.
02 / Type
Digits only
Type what you remember and press Check. The page shows the real number beside your answer.
03 / Grow
One more digit
A right answer adds a digit. A miss repeats the length with a new number, and a second miss ends the game.
Guide
How to play the number memory test, with the timings.
The number memory test shows you a number for a few seconds, hides it, and asks you to type it in. Start at 3 digits. Each right answer adds one digit, so the next number is longer. A miss repeats the same length with a new number, and a second miss ends the game. Your score is the most digits you typed right. The time on screen grows with the length, and you can set it to Short, Normal or Long. It is a game for fun, not a clinical test.
How to play the number memory test
- Pick how long the number shows under How long the number shows: Short, Normal or Long.
- Read the number while the bar runs down. Say it to yourself.
- When it hides, type the digits in the box. The number keyboard opens on a phone.
- Press Check or Enter. A right answer turns green and the next number has one more digit.
- After a miss you see the real number and your answer side by side. You get one more try at that length. A second miss ends the game and shows your score.
How long the number shows
At Normal, the time is 900 ms plus 400 ms for every digit. Short multiplies that by 0.7 and Long by 1.6.
| Digits | Short | Normal | Long |
|---|---|---|---|
| 3 | 1.5 s | 2.1 s | 3.4 s |
| 6 | 2.3 s | 3.3 s | 5.3 s |
| 9 | 3.2 s | 4.5 s | 7.2 s |
| 12 | 4.0 s | 5.7 s | 9.1 s |
For example, 6 digits at Normal is 900 + 6 x 400 = 3,300 ms, so 3.3 seconds. At Short it is 3,300 x 0.7 = 2,310 ms, so 2.3 seconds. The times in the table are rounded to one decimal place.
Ways to hold more digits
- Chunk. Read 482159 as 482 then 159. Two chunks of three digits are easier than six single digits.
- Make a picture or a rhythm. Some people hear a number as a tune or a phone number.
- Say it silently, once, and then once more with the same rhythm. Do not keep rehearsing in the last second, or you will blur it.
- Type from left to right and do not stop to check each digit.
About the numbers
Each number comes from your browser's secure random generator, and the first digit is never 0, so the length is what it says. If your answer is not exactly the same, it counts as a miss, including a missing digit. Your best and the last ten games are saved in this browser only. Compare scores at the same showing time.
To test another kind of memory, play the visual memory test or the sequence memory test. All four games are on the memory games page.
Questions
Good to know.
What is a number memory test?
A test where you see a number for a short time and then type it from memory. The number gets longer each time you succeed.
How many digits can I expect to remember?
It varies from person to person and day to day, so the page does not give a target. Compare yourself with your own earlier scores.
Why is there a bar under the number?
It shows how long the number stays. When it empties the number hides.
What happens if I get it wrong?
You see the real number and your answer. You get one more chance at the same length with a new number. A second miss ends the game.
Can the number start with 0?
No. The first digit is 1 to 9, so the length matches the level.
Is this a medical test?
No. It is a game. A score here says nothing about your health.
Does it work on a phone?
Yes. The number keyboard opens when the box appears.
Is anything sent anywhere?
No. Your best and last games stay in this browser.
