Upload a Matrigma-style 3x3 matrix, get the answer in seconds, and see the rules that fill the missing piece.
ReasonEra is an AI solver and tutor for Matrigma-style matrix questions from Assessio. You upload a screenshot of a 3x3 matrix; it returns the answer and, in Tutor Explanation mode, the rules behind it. ReasonEra reports 98%+ accuracy on Matrigma-style matrices. It supports practice and learning.
Matrigma is a non-verbal cognitive ability test from Assessio built from 3x3 matrices with one missing piece. You find the rules that run across rows and down columns, then pick the piece that completes the matrix. The adaptive version gets harder as you answer correctly.
Question: In each row, the third cell is the first two cells laid on top of each other. What goes in the missing cell?
Answer: A triangle with a small black circle inside it, as drawn in the answer box.
How the reasoning goes:
This is an original practice example written by ReasonEra, not a real test item.
ReasonEra has practice guides for these tests:
See all supported tests on the ReasonEra homepage.
| Category in the benchmark | General models tested | Specialised models |
|---|---|---|
| Advanced matrix reasoning (Raven's, Matrigma, Alva Labs style) | 51–76% | 96–99% |
Figures are from ReasonEra's own benchmark, published on 30 November 2025: 500+ analogous, publicly available items from 15 providers, tested blind with identical inputs, and no proprietary test items. The general models were GPT-4o, Claude Opus 4.5, Gemini 2.0 Pro, GPT-o1 and Grok 2, as they were at the time; general models have been updated since. The results have not been independently verified. Read the benchmark.
Different employers draw the line in different places, so confirm the rules for your test. For anything uncertain, a short email to the recruiter settles it.
ReasonEra is specifically built for Matrigma-style matrices and reports 98%+ accuracy on them. Its published benchmark concluded that specialised models outperform general-purpose models on advanced matrix reasoning. Try it free on your own questions.
Matrigma is a non-verbal cognitive ability test by Assessio with 3x3 matrices, where you find the pattern and choose the missing piece. See the Matrigma practice guide for the formats.
A free account includes 3 free trials. After that, a 14-Day Pass costs 49 € with unlimited use across all supported tests.
ReasonEra is a practice tool. Whether outside help is allowed in a live test is the employer's decision, and often it is not, so check before you start.
ReasonEra supports Matrigma-style matrices, including those that get harder as you progress. Accuracy can vary with image quality.
Start with the free trials, then choose a 14-Day Pass for 49 € when you want to practise without limits.
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Sources and notes. Accuracy figures come from ReasonEra's published benchmark (30 November 2025) and are ReasonEra's own, not independently verified. Examples on this page are original practice examples written by ReasonEra, not real test items. Spotted something out of date? Email info@reasonera.com. Written by the ReasonEra team. ReasonEra is not affiliated with any test publisher named on this page.