The number memory test shows you a number for a few seconds, hides it, and asks you to type it back. Each time you get it right, the number grows by one digit. Your score is the longest number you recalled correctly. It sounds simple, but it is a quick window into one of the busiest parts of your mind: short-term memory.
Think of long-term memory as a huge warehouse and short-term memory as the small desk where you lay things out while you work on them. The desk is fast to use but has room for only a handful of items. When a new number arrives, each digit needs its own spot on the desk. Once the desk is full, adding one more digit pushes something else off the edge, and that is usually the moment you get a round wrong.
In 1956 the psychologist George Miller wrote a famous paper called "The Magical Number Seven, Plus or Minus Two." He noticed that across many kinds of tasks, people could hold roughly five to nine items in mind at once. Later researchers argued the true limit for unrelated items is closer to four, and that we reach seven only because we quietly group things together. Either way, if you land somewhere around 7 to 9 digits on BlinkCup, you are right in the normal range.
| Your score | Roughly means |
|---|---|
| under 6 digits | Below typical — often a distraction, a rushed glance or simple fatigue |
| 6–8 digits | Typical adult range |
| 9–11 digits | Above average — you are probably chunking without realising it |
| 12+ digits | Excellent — usually a deliberate technique |
These bands are rough guides for a casual online test, not a clinical assessment.
Chunking means grouping several small items into one bigger item, so it takes up just one spot on the desk. You already do this with phone numbers: nobody remembers eleven separate digits, they remember three short groups.
Practising a specific test usually improves your score on that test, mostly because you get better at strategies like chunking. Whether that carries over to everyday memory is debated by researchers, so treat BlinkCup as a fun challenge rather than brain training.
Every finished memory test adds your score to your country's average in the BlinkCup world ranking. A country appears in the ranking once enough people from it have played. It is a playful comparison, not a scientific study: players choose themselves, and conditions vary from person to person.