Games
Number Memory Test — How Many Digits Can You Remember?
A number appears for 3 seconds — memorise it, then type it back. Each correct answer adds a digit. How long a number can you remember?
A number will appear for 3 seconds — memorise it, then type it back. Each correct answer adds one more digit. How far can you go?
How it works
This test measures digit span — the number of digits you can hold in working memory. The number is displayed for exactly 3 seconds, then hidden. Each correct answer advances to a longer number. Most adults can reliably remember 7 digits (±2), consistent with Miller's Law. Percentile rankings are based on digit span norms from cognitive psychology research.
Frequently Asked Questions
- What is digit span?
- Digit span is a measure of working memory — the longest sequence of digits a person can immediately repeat back. The average adult manages 7 digits.
- Is this the same as the IQ number memory subtest?
- It uses the same methodology as the digit-span subtest found in IQ assessments (like the Wechsler scales), but this is not a validated IQ test.
- Is my data sent anywhere?
- No. Everything runs in your browser.