— Comparison
Core Brain vs Mensa Test
Mensa's online workout is the most famous free IQ test — but it's specifically a Norwegian Mensa puzzle test, not a Wechsler-style cognitive assessment. Here's how Core Brain compares.
| the Mensa workout | Core Brain | |
|---|---|---|
| Format | 20 progressively harder Raven-style matrix puzzles, no time pressure, single composite score | 40 items across 6 cognitive axes (pattern, spatial, logic, verbal, numeric, matrix), IRT 3PL Bayesian scoring, full normed IQ with 95% CI |
| Methodology | Single-axis matrix reasoning | IRT 3PL Bayesian MAP |
| Confidence interval | No | Yes (95% CI) |
| Six-axis breakdown | No | Yes |
| Time | 30-45 min | 20 min |
| Cost | Free | $15 |
Verdict
Mensa's workout is excellent for pure matrix reasoning measurement, but only tests one cognitive dimension. Core Brain measures six axes — useful if you want to see WHERE you're strong, not just one composite number.
Try Core Brain
20 minutes, six cognitive axes, full normed IQ with 95% confidence interval. $15 unlock or take a promo code if you have one.
Which should you take?
Take the Mensa workout if:
- You want pure matrix reasoning measurement
- You're preparing for Mensa-style supervised tests
- You want a completely free option
Take Core Brain if:
- You want a calibrated 20-minute test with real IRT scoring
- You want to see WHICH cognitive axis you're strongest in, not just a single number
- You want a 95% confidence interval on your score (the mark of a real psychometric test)
- You want a downloadable certificate