🧠 Number Memory Test
How many digits can you memorize in sequence? Tests working memory. Average is 7 digits.
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What Is Working Memory?
Temporarily holds and manipulates information. Governed by the prefrontal cortex. George Miller's 1956 paper: humans hold 7±2 chunks in working memory.
| Age | Average Span |
|---|---|
| Under 10 | 4–5 digits |
| 18–40 | 7–8 digits |
| 60+ | 5–6 digits |
Tips to Improve
- Chunking — group into 2–3 digit pairs
- Rhythm — say digits with a beat
- Visualization — associate numbers with images
Frequently Asked Questions
Correlates with reading comprehension, math ability, and fluid intelligence. Used in IQ tests (WAIS).