Number Memory Test
A number appears for a few seconds. When it disappears, type it back. Each correct answer adds one digit. Your score is the longest number you remembered, a measure of your short-term memory known as digit span.
How many digits can you remember?
A number appears, then disappears. Type it back. Each level adds one digit.
Press Enter when you are ready
How to use the Number Memory Test
- Press Start test. Choose a timing mode and the number of lives first if you like.
- Memorize the number while the bar runs down. Press Enter to skip ahead when you are ready.
- Type the number when it disappears and press Enter or Submit.
- Keep going: each correct answer adds a digit. A wrong answer ends the test (or costs a life).
- Check your score, see which digits you mixed up, and compare with your history.
What your score means
This test measures forward digit span: the longest string of digits you can hold in short-term memory and repeat in order. In his famous 1956 paper "The Magical Number Seven, Plus or Minus Two", psychologist George Miller described a typical span of about 7 items, which is why phone numbers are often split into short groups.
| Score (digits) | What it suggests |
|---|---|
| 1 to 4 | Below typical: often a warm-up result or a distraction |
| 5 to 6 | Slightly below the usual adult range centre |
| 7 to 9 | Typical adult span (7 ± 2) |
| 10 to 12 | Above typical, usually with chunking strategies |
| 13+ | Exceptional; common only with dedicated memory training |
These bands are a rough guide for this kind of test, not clinical norms. Formal digit span tests in psychology are read aloud and scored differently.
Timing in each mode
| Mode | Formula | 5 digits | 10 digits |
|---|---|---|---|
| Fast | 0.5 s + 0.4 s per digit | 2.5 s | 4.5 s |
| Standard | 1 s + 0.7 s per digit | 4.5 s | 8 s |
| Relaxed | 2 s + 1 s per digit | 7 s | 12 s |
Tips to remember more digits
- Chunk the number. Read 5 8 3 9 1 4 as 583 914 or 58 39 14. Two or three chunks are much easier to hold than six separate digits.
- Use your inner voice. Repeat the chunks silently with a rhythm until you type them.
- Find patterns. Link chunks to years, ages, times or sums (19 84, 7 14 21).
- Type immediately. Do not wait: short-term memory fades within seconds without rehearsal.
- Test when fresh. Sleep, focus and a quiet room make a big difference; compare scores taken at similar times of day.
Frequently asked questions
How is the score calculated?
Your score is the number of digits in the longest number you typed back correctly. If you remember 8 digits and then miss the 9-digit number, your score is 8. In three lives mode a miss does not end the test; you retry the same length with a new number.
What is a good score on a number memory test?
Psychologists measure this as forward digit span. A classic finding (Miller, 1956) is that most adults can hold about 7 items, plus or minus 2, in short-term memory, so scores of 5 to 9 are typical. Online tests with practice and chunking often see higher scores, and 10 or more is very good.
How long is each number shown?
In standard mode the number is shown for 1 second plus 0.7 seconds per digit, so a 7-digit number stays on screen for 5.9 seconds. Relaxed mode shows it for 2 seconds plus 1 second per digit, and fast mode for 0.5 seconds plus 0.4 seconds per digit. Press Enter at any time to hide it early.
How can I remember more digits?
Group the digits into chunks of two or three (for example 48 15 92 instead of 481592), say them silently in a rhythm, or link chunks to familiar numbers such as years or times. Chunking is the main reason scores improve with practice.
Is this the same as an IQ test?
No. Digit span is one small part of some intelligence and memory assessments, but on its own it only measures short-term memory for numbers. Tiredness, distraction and practice change your score from day to day.
Is my score history saved?
Yes, your last 30 tests are saved in your browser's local storage on this device only. Nothing is sent to a server, and you can clear the history at any time.