Cognition · ~5 minutes
Find the pattern. Follow the logic.
Fifteen puzzles — number series, syllogisms, deductions, and odd-one-out — climbing from easy to hard. This is fluid reasoning: solving novel problems on the spot, with far less dependence on vocabulary or background than a verbal test.
Each puzzle offers four choices; pick the single best answer. The questions get harder as you go, and there's no going back once you choose. Take your time — logical reasoning rewards careful thinking, not speed.
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Your logical reasoning
Percentiles are approximations from a fifteen-item, difficulty-weighted test — a genuine snapshot, not a normed clinical score. Logical reasoning is among the fairer cognitive measures across language and background, but a single short run still can't capture the full range of how you think.
About this instrument
What this measures — and what it doesn't
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Measures
Fluid reasoning
Pattern extraction and valid inference on novel problems — the reasoning that works without relying on stored facts. It's the ability most central to what psychologists mean by general intelligence, and the least tied to schooling.
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Method
15 graded items, weighted
Five easy, five medium, five hard across four problem types — series, syllogisms, deduction, odd-one-out. Presented easiest-first, options shuffled each run, and scored so a hard win counts triple an easy one.
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Result
Percentile + tier breakdown
An approximate percentile plus how you did at each difficulty — showing whether you plateau at medium or push into the hard tier. Near-chance accuracy is flagged and the score withheld rather than dressed up.
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Limits
Honest limits
Fifteen items is a snapshot, not a normed instrument, and fluid reasoning is state-dependent — fatigue and stress lower it. This is for self-reflection, never a credential, aptitude decision, or verdict on anyone's mind.
Go deeper
The science behind this instrument
Pattern recognition & fluid reasoning
The core of solving problems you've never seen before.
Read TheoryFluid vs crystallized intelligence
Why logical reasoning sits at the fluid end of the spectrum.
Read FundamentalsWhat is IQ, really?
Where logical reasoning fits in the measurement of intelligence.
ReadQuestions
Before you begin
What does a logical reasoning test measure?
Your ability to spot patterns and draw valid conclusions — through number and letter series, syllogisms, deductions, and odd-one-out problems. It taps fluid intelligence: reasoning that works on novel problems rather than stored knowledge.
How is this different from the verbal test?
Verbal reasoning leans on vocabulary you've accumulated — crystallized knowledge. Logical reasoning leans on extracting rules and applying valid inference in the moment, which depends far less on language background or education, making it a fairer measure across groups.
Why are harder questions worth more?
The score weights each item by difficulty, so clearing the hard tier counts for more than sweeping the easy one. That way your result reflects the ceiling of your reasoning, not just how many gentle warm-ups you got right.
Is a high score proof of intelligence?
No. Fifteen items is a snapshot, not a full assessment, and a single number never captures a mind. This is an educational instrument for self-reflection — useful for seeing how you approach novel problems, not a credential or a verdict.
Logic is one domain. See all five.
The full adaptive test maps reasoning across pattern, numeric, verbal, spatial, and memory.
Start the assessment