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Digit Span — working memory training

💡Benefits

Digit span is a classic way to measure and train working-memory capacity. Baddeley (1992) showed working memory underlies reading, arithmetic and focus. Miller (1956) found people hold about 7±2 items at once — this exercise helps stretch that capacity.

🎮How to play

A sequence of digits is shown briefly. Memorise it, then type it back in the same order. Each level adds more digits.

📚Scientific sources

  1. Miller (1956). The magical number seven, plus or minus two. Psychological Review, 63(2), 81–97. https://scholar.google.com/scholar?q=The+magical+number+seven+plus+or+minus+two+Miller+1956
  2. Baddeley (1992). Working memory. Science, 255(5044), 556–559. https://scholar.google.com/scholar?q=Working+memory+Baddeley+1992+Science

Frequently asked questions

Yes, on MentalMath this game is completely free and you can play it without any registration.
The child memorizes a sequence of digits and repeats them in the same order, which strengthens short-term memory and memory span.
It suits children from age 6: the sequence starts short and gradually grows longer as the child improves.
Yes, it works smoothly on phones, tablets and computers with no app to install.
About 5 to 10 minutes of regular daily practice noticeably increases how many digits a child can hold in memory.
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