Your IQ —
what percentile?
20 visual-reasoning questions, about 10 minutes. We calculate your estimated IQ, deviation score, and percentile, plus a profile across four areas. Free to take, no signup.
Free to take, no signup. Viewing the result report (including your estimated IQ) is a one-time ¥300, tax included. See pricing and a sample report
Which figure fits the blank?
Four cognitive abilities measured
Non-verbal measurement based on Raven's matrices (Carpenter et al. 1990)
IQ Dojo: Try Sample Problems
Try real-format sample problems from each domain — a quick warm-up before the test.
Problem 1：The arrow rotates 90° clockwise in each row. What is the third cell?
Options
Three simple steps
Take the test
20 questions, no time limit. Spot the rule in each abstract figure.
Explore your profile
Your answers are grouped into spatial reasoning, pattern recognition, logical reasoning, and classification.
See your result
View results for ¥300, including estimated IQ, four-area analysis, and a certificate. Save an image or PDF.
SAMPLE REPORT
More than a single IQ number
Illustrative scores and answers only. This is not your result or a real person's record.
- Estimated IQ
- 120
- Top
- 9.12%
- Deviation score
- 63.3
Correct answers by area — example
- Spatial reasoning4 / 5
- Pattern recognition5 / 5
- Logical reasoning3 / 5
- Classification4 / 5
The full report highlights your relative strengths across these four areas and offers ideas for practice and self-reflection. Each area contains five questions, so small differences should be read cautiously.
Also included: BrainRank result certificate and image/PDF export. Percentiles use a normal model with mean 100 and SD 15; they are not a survey of test takers.
The science behind it
This test is designed on intelligence research—why abstract figures can measure IQ.
Informed by visual-reasoning research
Matrix-reasoning and general-intelligence research inform the design. These references describe its background; they are not studies validating BrainRank's own measurement accuracy.
A non-verbal figure format
The questions ask you to find rules in figures rather than answer factual questions. This reduces reliance on language knowledge, but does not remove the effects of education, culture, or familiarity with the format.
Rules are theoretically defined
Items are automatically generated based on the rules Carpenter et al. (1990) identified in the RPM (rotation, quantitative progression, addition and subtraction of figures, and distribution of three values). Each answer is uniquely determined.
Scored with item response theory (IRT)
An IRT model allows for chance success on six-choice questions, then applies a response-time adjustment and converts ability θ using IQ=100+15θ. Item difficulty and conversion include model assumptions; the result is not equivalent to a standardized assessment.
References
- Spearman, C. (1904). “General Intelligence,” Objectively Determined and Measured (the discovery of general intelligence g) The American Journal of Psychology, 15(2), 201–293.
- Raven, J. C. (1938). Raven's Progressive Matrices (the standard measure of nonverbal, fluid intelligence) London: H. K. Lewis.
- Carpenter, P. A., Just, M. A., & Shell, P. (1990). What one intelligence test measures: A theoretical account of the processing in the Raven Progressive Matrices Test (decomposing RPM into five rule types) Psychological Review, 97(3), 404–431.
- Rasch, G. (1960). Probabilistic Models for Some Intelligence and Attainment Tests (IRT / the Rasch model) Danish Institute for Educational Research.
- McGrew, K. S. (2009). CHC theory and the human cognitive abilities project (CHC theory) Intelligence, 37(1), 1–10.
Look up IQ rarity
See what percentile and 1-in-N each IQ corresponds to.
See all scores in the IQ chartIQ distribution data
Share and population ratio of each IQ band on a normal curve.
How to solve
Tips and worked examples for all four areas.
Articles
Reads on IQ averages, rarity, the g factor, and more.
IQ classification
Mean IQ is 100, SD 15. Scores fall into the following ranges.
How to raise your IQ
Do brain-stimulating activities
Puzzles, problem-solving, and learning new skills strengthen neural connections.
Get quality sleep and rest
Sleep is essential for attention, memory, and decision-making. Adequate rest optimizes cognitive performance.
Eat a balanced diet
Antioxidants, omega-3s, vitamins, and minerals support brain health and cognitive function.
Exercise regularly
Exercise boosts blood flow to the brain, helps generate new brain cells, and improves cognition.
Keep learning
Reading, courses, and new experiences stimulate the brain and build adaptability. Consistent learning is key.
Manage stress and mental health
Chronic stress harms cognition. Meditation and mindfulness help keep your brain healthy.
FAQ
- Is this IQ test free?
- Taking the 20 questions is free. Viewing results, including your IQ estimate, costs ¥300 (tax included), with no recurring billing. Reopen using the same checkout return link for 24 hours after first opening and download an image or PDF while it is open.
- How long is it and how many questions?
- 20 questions. No time limit, but your speed factors into the score. All are abstract-figure pattern items (6 choices), independent of language or knowledge.
- Is the displayed IQ accurate?
- It's an estimate based on a normal model (mean 100, SD 15). It's a fun guide, not an official psychological assessment.
- Do I need to sign up?
- No. You can take it anonymously; sign in with Google to save results across devices.
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What percentile is your IQ? Find out in 20 questions
~10 minutes · no signup
Free to take, no signup. Viewing the result report (including your estimated IQ) is a one-time ¥300, tax included. See pricing and a sample report