Number Memory Test
How many digits can you hold in your head?
The test
A number flashes — about a second per digit — then you type it back. Start at four digits; every correct answer adds one. Your span is the longest number you got right, and your best stays on this device.
Seven, plus or minus two
Average digit span is 7 ± 2 — George Miller's famous 1956 paper gave working memory psychology its best-known number — so 7-8 here is solidly normal, 10+ is genuinely good, and the memory athletes reciting 50+ digits are doing something else entirely: chunking. They convert digit groups into images and weave stories; the major system maps digits to consonant sounds, sounds to words, and suddenly one image holds six digits.
You chunk already without noticing — a phone number is three familiar groups, not ten digits. Apply it deliberately: read the flashed number in rhythmic groups of three and your span jumps a level or two immediately. The sequence and visual tests probe the spatial versions of the same working memory, and the password guide explains why passphrases lean on exactly this chunking trick.
Frequently asked questions
What is a good number memory score?
7-8 digits is average (Miller's 7 ± 2), 10+ is strong, and scores beyond 12 usually mean you are chunking — which is the skill, not cheating.
How do memory champions remember 50+ digits?
Chunking systems: digits become sounds, sounds become words, words become images placed along a route. The record holders memorise pictures, not numbers.
How can I improve quickly?
Group the digits in threes and read them rhythmically, like a phone number. That one habit typically adds one to two levels on the spot.
Why does the number show for longer at higher levels?
Display time scales at roughly a second per digit, matching how the classic digit-span test is administered.