Number Sequence Memory Game

Press Start, read the number, then type it back once it hides, one digit longer every time you get it right.

Ready Press Start. A number flashes up. Type it back. Every round adds a digit.
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The standard run. One digit to start, one more after every right answer, and the first wrong answer ends the run. A number of n digits stays up for 1,200 ms plus 600 ms a digit, so seven digits get 5,400 ms and ten get 7,200 ms. Read a long number in threes: 471930528 becomes 471, 930, 528, which is three things to hold where there were nine.

–This run

–Your best

–Last run

Starts at 1 digit and adds one every round. The run ends at the first wrong answer.

No runs yet. Your last ten will show up here.

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One round is picked each day, the same for everyone. Finish it and a badge counts your days in a row.

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Next step Swap the digits for lit tiles: sequence memoryA number that never changes: type pi from memory

All 6 rounds

Standard look, three starting lengths 3

  • Forward digits from 1 The standard run. One digit to start, one more after every right answer, and the first wrong answer ends the run. A number of n digits stays up for 1,200 ms plus 600 ms a digit, so seven digits get 5,400 ms and ten get 7,200 ms. Read a long number in threes: 471930528 becomes 471, 930, 528, which is three things to hold where there were nine.
  • Forward digits from 5 Skips the four shortest numbers and keeps every other rule. A run to 10 digits takes 6 numbers here against 10 from the start, so you reach the lengths that stop you with fresher attention. Five digits show for 4,200 ms. Decide where the cut falls before the number hides: 47193 as 47 and 193, or as 471 and 93.
  • Forward digits from 10 Starts at ten digits, shown for 7,200 ms, and climbs from there. A run to 12 digits takes 3 numbers here against 12 from the start. Read ten digits as three, three and four, with a pause between the groups. A 10-digit number holds a double digit 61% of the time, so find the pair first. Miss the first number and the run scores 0, so warm up on another round.
Show all 6 rounds (3 more)

Shorter, longer and flat looks 3

  • Flat-look digits Three seconds plus only 100 ms a digit, so the look barely grows: 3,100 ms for one digit, 4,000 ms for ten and 6,000 ms for thirty. From four digits up it is shorter than the standard look, and the time per digit falls from 850 ms at four digits to 400 ms at ten and 200 ms at thirty. Short numbers feel generous and long ones do not, so the wall arrives suddenly.
  • Long-look digits Two seconds plus a full second a digit, so seven digits stay up for 9,000 ms and ten for 12,000 ms. That is time enough to build chunks, spot a year such as 1945 and rehearse the tail. The first chunk is typed straight away, so read it once and spend the spare seconds on the last two. Use it to practise one technique before you take it to the standard run.
  • Quick-look digits The same run with a shorter look: 500 ms plus 200 ms a digit. Seven digits stay up for 1,900 ms against 5,400 ms in the standard run, and ten for 2,500 ms, which is too short to say the number twice. The grouping has to happen while you read, so take the digits in threes on the first pass and start typing the instant they hide.

How this list was compiled: Rounds written for this page. Every row is a round the tool plays today. Every figure was computed on 2026-09-19: in the three forward rounds a number of n digits stays up for 1,200 ms plus 600 ms a digit (5 digits 4,200 ms, 7 digits 5,400 ms, 10 digits 7,200 ms, 30 digits 19,200 ms, which is 640 ms a digit); the quick look is 500 ms plus 200 ms a digit (7 digits 1,900 ms, 10 digits 2,500 ms), the long look 2,000 ms plus 1,000 ms a digit (7 digits 9,000 ms, 10 digits 12,000 ms) and the flat look 3,000 ms plus 100 ms a digit (1 digit 3,100 ms; 4 digits 3,400 ms, which is 850 ms a digit and the first length where it is shorter than the standard look; 10 digits 4,000 ms, 400 ms a digit; 30 digits 6,000 ms, 200 ms a digit); each digit after the first matches the one before it one time in ten, so a number of n digits holds at least one double with probability 1 minus 0.9 to the power n minus 1 (52% at 8 digits, 61% at 10); a run to 10 digits takes 10 numbers from 1 digit and 6 from 5 digits, and a run to 12 digits takes 12 numbers from 1 digit and 3 from 10 digits. Outside facts, checked on 2026-09-19: the usual pace of one item a second in a memory-span test is from https://en.wikipedia.org/wiki/Memory_span; the 1956 paper by George A. Miller in Psychological Review, his observation of a span of about seven items in young adults, his point that the limit counts chunks, the span shifting with the material and Cowan's figure of about four chunks are from https://en.wikipedia.org/wiki/The_Magical_Number_Seven,_Plus_or_Minus_Two. No clinical test is named. Miller's seven is quoted as history, not as a yardstick for this game. Licence: own work

How it works

This number sequence memory game shows a number, hides it, and asks you to type it back. Each right answer adds a digit, from 1 up to 30, and the first wrong answer ends the run. As a number memory test it gives one figure, the longest number you typed back right.

Read the full guide

How the numbers grow

Press Start and a one-digit number appears. A number of n digits stays up for 1,200 ms plus 600 ms a digit, so seven digits get 5,400 ms. Type it (the last digit ends the turn), then press Next number. Spaces are ignored, so 471 930 counts as 471930. In the Round menu, Forward digits from 5 and Forward digits from 10 skip the short numbers.

Where seven, plus or minus two comes from

It is the title of a 1956 paper by George A. Miller in Psychological Review. He observed that young adults could repeat back about seven items, and argued that the limit counts chunks, not digits: 1945 is one chunk to anyone who knows the year. Later work found the span shifts with the material, and Cowan put it nearer four chunks. So read 471930528 as 471, 930, 528.

  • Rest your fingers on the number keys while the number is up, and type the instant it hides.
  • An 8-digit number holds a double digit 52% of the time. Find the 77 or the 00 first and hang the rest on it.
  • You type the first chunk straight away, so read 471 once and spend the rest of the look looping 930 528.

Questions and answers

How many digits should I be able to remember?

There is no number you should reach. The famous seven comes from George Miller's 1956 paper, and it is no target here. A typical span test presents each item once, at one a second. This game shows the whole number at once, so you can group and study it. The two are not like for like. This page has no average of its own to print. Chase your own best in one round.

How long does each number stay on screen?

The three forward rounds give ten digits 7,200 ms and thirty digits 19,200 ms. Quick-look digits gives ten digits 2,500 ms, Flat-look digits 4,000 ms and Long-look digits 12,000 ms. A line under the number counts the seconds down.

Can a number memory test tell me if my memory is failing?

No. How many digits you type back depends on your technique, how awake you are, the device in your hands and luck with the numbers dealt. It is a game result, not a clinical measure, and it cannot pick up or exclude any illness. Worries about memory belong with a doctor.

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