Numbers appear on the grid. The moment you tap number one, the rest vanish — tap them in order from memory. One more number every level.
Half of players reach 9
A set of numbers appears scattered across the grid. Take as long as you like to look at them — the clock is not running. The moment you tap number one, every other number is hidden, and you have to tap the rest in order from memory. Clear a level and the next one adds another number.
It is named after working-memory experiments at Kyoto University, where young chimpanzees outperformed human adults at this exact task. Half of the people who play it here reach 9. Most who do well say they remember the shape the numbers make rather than reading them one by one.
From 730 tests played on this site since August 2026. Higher is better.
| Players | Computer | Phone |
|---|---|---|
| Top 10% | 12 numbers or more | 12 numbers or more |
| Top 25% | 11 numbers or more | 11 numbers or more |
| Median | 9 numbers | 9 numbers |
| Bottom 25% | 8 numbers or below | 8 numbers or below |
9 numbers, on a computer or a phone: the middle of more than 700 tests played here. 11 puts you in the top quarter, and 12 or more in the top 10%.
Numbers appear scattered on a grid. The moment you tap number one, the rest are hidden, and you have to tap them in order from memory. Each level adds one more number.
It comes from working-memory experiments at Kyoto University, where young chimpanzees did better at this exact task than human adults. On this site the middle score is 9.
Most people do better by remembering the shape the numbers make rather than reading them one at a time. You get three lives, and a failed level can be retried.
More to play: Herd Memory, Reaction Time Test, or all solo games.
Questions or stuck? support@herdgamesonline.com