How many digits can you remember?
A number flashes up for a moment. When it disappears, type it back. Each round adds one more digit. You get 3 lives.
Tip: try saying the digits in your head in small groups, like a phone number. No writing them down!
About this test
What does it measure?
Your short-term memory span for numbers: how many digits you can hold in mind at once. Psychologists use a similar "digit span" task as one part of some full IQ tests.
What is a normal score?
Most adults can repeat back somewhere around 7 digits, give or take a couple. Practice, focus and memory tricks like grouping can push that higher.
Is my result stored?
No. Everything runs in your browser, and nothing is sent anywhere.
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Try the full IQ test
36 questions on number patterns, visual puzzles and logic, with your answers explained at the end.
Take the IQ test