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Digits remembered
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PTS–
Turtle
HUMAN SPEC · Memory · about 2 minutes
Number Memory Test
Can you remember a phone number after hearing it once? That is what we measure.
Number memory
Can you remember a phone number after hearing it once? That is what we measure.
A number appears briefly, starting at 3 digits.
Memorise
Type the number you remember
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Baselines are initial values and will be updated as real data accumulates.
HALL OF FAME
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Gear for this ability
Memory training book
Digit span responds to training more than any other ability here. Chunking practice alone adds 2 to 3 digits.
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HALL OF FAME
Hall of Fame
Only the top 10 get their name up. No login, weekly and all-time.
| # | Nickname (2 to 12 characters) | Digits remembered |
|---|
01
How it works
- A number appears briefly, starting at 3 digits.
- When it disappears, type what you remember and press check.
- Correct answers add a digit. One mistake ends the test. Your record is the longest number you got right.
02
About this test
The average person holds about 7 digits in short term memory. George Miller called it "the magical number seven, plus or minus two" in 1956, and it is one reason phone numbers are 7 to 8 digits long.
This test starts at 3 digits and grows by one each time you are correct. People who chunk digits into groups of 2 or 3 often pass 10. Digit span responds to practice more than any other ability here, so try again in a few days.
03
Benchmarks
| Result | Top % |
|---|---|
| 2 digits | 99.5% |
| 3 digits | 99% |
| 4 digits | 97% |
| 5 digits | 90% |
| 6 digits | 75% |
| 7 digits | 55% |
| 8 digits | 38% |
| 9 digits | 25% |
| 10 digits | 15% |
| 11 digits | 9% |
| 12 digits | 5% |
| 14 digits | 2% |
| 16 digits | 1% |
| 20 digits | 0.1% |
Baselines are initial values and will be updated as real data accumulates.
04
In everyday life
- Copying a verification code or phone number after one glance.
- Remembering a shopping list without notes, or a figure someone said in a meeting.
- It can be maintained and improved at any age with chunking practice.
05
FAQ
How long is the number shown?
1 second plus 0.4 seconds per digit. Five digits show for 3 seconds, ten digits for 5.
How can I remember more?
Break the number into groups of 2 or 3, say them out loud, or link them to numbers you know like birthdays and years.
Is a low score a problem?
Digit span is not a direct measure of intelligence or health. Lower results when tired or distracted are normal.
References
Other tests in this series
View the Human Spec series01ReactionSlamming the brakes, catching a falling cup. We measure that 0.2 seconds.about 30 secondsReflex. Tap when it turns green02Click speedTicket drops, refresh wars, course registration. How fast is that finger?10 secondsSpeed. Click fast for 10 seconds03TypingHow fast you reply, how fast you finish the report. Your fingers, measured.30 secondsDexterity. Type the passage for 30s04ColourMatching outfits, editing photos, picking a foundation shade. The precision of your eyes.up to 60 secondsPerception. Tap the odd-shaded tile