How long do I get to memorize each string?

Study time scales with the string's length, so longer digit strings in later rounds get proportionally more time to study.

Most people can reliably hold 7±2 digits in working memory — reaching double digits consistently is a strong result.

Can I use a strategy like chunking the digits?

Yes, any memory technique is fair game, grouping digits into smaller chunks is a well-known way to hold longer strings in working memory.

Memorize a digit string, then type it back — each round adds one more digit.

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Memorize the digit string, then type it back — each round adds one more digit.

1Click "Start" to see a short digit string — memorize it before it disappears.
2Once it's hidden, type the digits back exactly in order.
3Get it right and the next round adds one more digit to memorize.
4One wrong answer ends the round — your score is the longest digit string you recalled correctly.

Sequence Recall

Watch a growing sequence flash, then repeat it back in order.

Card Flip Match

Flip two cards at a time to find matching pairs before the timer runs out.

Word Memory Match

Flip cards to find matching word/definition pairs.

Distraction Focus Test

Spot the target word hiding among near-identical decoys.

Face-Name Recall

Study four faces and names, then match each face to its name from memory.

Simon Says Sequence

Watch the color sequence, then repeat it back — one more color every round.