Cognitive Performance Challenge
Digit-span memory challenge — how many digits can you hold in mind?
Tool 16 · 3 min · Educational tool
A sequence of digits will appear. Remember it, then type it back. Each success adds one digit. You have two lives.
How this works
- Model
- Forward digit span (v1.0)
- Source
- Digit span is a long-standing working-memory measure; typical adult forward span is about 7 ± 2 (Miller GA, Psychol Rev 1956). — reference
- Intended use
- Engaging working-memory challenge to track over time.
- Population
- Adults
- Limitations
- Not a clinical cognitive assessment.
- Tiredness and distraction affect results.
- Status
- Educational tool · methodology checked 3 November 2026
Educational self-assessment — not a diagnostic test. Results are based on published research and population data and can't account for everything about you. They are not a diagnosis and don't replace advice from a healthcare professional. If you're worried about your health, speak to your GP or call NHS 111.