Numbers 1 through 9 flash briefly on the grid, then turn blank. Click them back in the correct order, purely from memory.
What This Test Measures
Numbers 1 through 9 flash briefly on a grid, then turn blank. You click them back in ascending order, purely from memory of where each number was positioned. It is loosely inspired by a well-known chimpanzee memory study, and it is noticeably harder than it sounds once the numbers disappear.
The Science Behind It
This task combines visuospatial memory with sequencing, remembering not just where things were, but their correct order. The original research comparing young chimpanzees to human adults on a similar task (Inoue & Matsuzawa, 2007) found that young chimps often outperformed human adults, a widely cited and still-debated finding in comparative cognition. Researchers have since debated how much of that gap reflects a genuine memory advantage versus differences in task familiarity and motivation between species.
What Makes This Harder Than Simple Recall
Illustrative difficulty comparison, not a precise measurement.
How This Connects to Your Overall IQ Score
This task draws on the same visuospatial and working memory systems measured in our number memory and visual memory games, combined into a single harder challenge. Strong performance here often predicts solid results across the memory-adjacent portions of our main IQ test, particularly questions that require holding a visual sequence in mind while reasoning about it. Because it blends two separate skills, spatial position and numerical sequencing, into one task, it is also one of the more demanding games in our collection, and a useful benchmark if you want to compare yourself against results from our other memory-focused tools.
Tips for a More Accurate Result
- Try to form a mental map of the grid rather than memorizing coordinates individually.
- Focus on the first few numbers’ positions first; recency and primacy both affect recall.
- Don’t rush your first click; a wrong first guess often cascades into more errors.
- Use the brief flash to build a rough path connecting 1 through 9 rather than nine separate memories.
- If your accuracy drops, slow down slightly on the next round rather than trying to go faster.
Who Uses This Test
People come to this test for a few different reasons: pure curiosity about a specific cognitive skill, a quick mental warm-up or break during the day, or as a lightweight way to track their own performance over time by revisiting it occasionally. Some use it alongside our other brain games to build a fuller picture of their cognitive strengths across memory, speed, and reasoning, rather than relying on a single blended score. None of these uses require any particular background or preparation; the test is designed to be approachable on a first attempt while still offering a real, meaningful challenge as it gets harder.
Frequently Asked Questions
Taking the Bigger Picture Further
A single-skill game like this one is a useful snapshot, but it only tells part of the story. Our full free IQ test combines 36 calibrated questions across spatial, numerical, logical, and applied reasoning into one complete picture, with a composite score, percentile rank, and a category breakdown you can compare directly against results like this one. If you are curious how a specific cognitive strength shows up in a broader reasoning context, that full test, taking about 20 to 25 minutes, is the most complete free option available on this site.
Try More Brain Games
See the full brain games collection, or take the full 36-question IQ test for a complete reasoning breakdown.