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Number Memory — How Many Digits Can You Remember?

Memorize sequences of digits and type them back. Each round adds one more digit. Test your digit span.

▶ Play Number Memory

How to play

A sequence of digits appears on screen — for example, "4729". Memorize it, then type it back when the number disappears. Get it right and the sequence grows by one digit. Get it wrong and you lose a life — three mistakes and the session ends. Your digit span is your best record.

What it trains

Number Memory is a digit span test — the same instrument psychologists use to measure verbal short-term memory. The average adult can hold 7 ± 2 digits. With daily practice, most people reach 10–12 digits within a few weeks. This skill helps with phone numbers, PINs, addresses, and any task where you need to remember a number without writing it down.

Tips to improve your score

• Chunk digits in pairs or triples: "4729" becomes "forty-seven, twenty-nine".
• Pair digits with a rhythm — "4-7… 2-9" is easier than a monotone recitation.
• Use the major system: 0 = s, 1 = t, 2 = n. "4729" becomes "ruck, nap" — a mental image is easier than a raw digit string.
• Practice in the morning. Short-term memory is strongest right after waking.

Frequently asked questions

What's a normal digit span?

Most adults score 6–8 digits without special training.

Is it free?

Yes, no registration required.

Is progress saved?

Yes, your best record is stored in your browser.

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