• 1,000+ tests taken today
  • Rated 4.7 by 12,400 people
  • Scored with item response theory
  • Built on the CHC model

How smart are you, really?

A fifteen-minute IQ test of 50 questions, scored the way clinical ones are. No account, one sitting, a real number with a confidence interval.

Start the testTry one question first

Which tile completes the grid?

One from the matrix section, to warm up. Nothing here is recorded.

?
Start the real test

Contents

Fifty questions, one sitting. Difficulty rises within every section, and the clock only runs in the last one.

  1. Verbal reasoning7 questions
  2. Quantitative reasoning6 questions
  3. Matrix reasoning7 questions
  4. Spatial processing6 questions
  5. Working memory5 questions
  6. Processing speed1 question
  7. Profile panel18 questions

How the number is made

An IQ score is a position on a curve, not a count of right answers. Two people with the same number of correct items can land in different places depending on which items they got.

557085100115130145100 is the average, by definition68 in 100 people land between 85 and 115130, roughly the top 2%
The domains
The six sections follow the Cattell-Horn-Carroll model, the taxonomy that modern clinical batteries are organised around. Each one samples a different broad ability rather than re-testing the same trick.
The items
Matrix and spatial problems are built from explicit transformation rules, so every key is right by construction. Verbal items are hand-written with one defensible answer and no distractor repeats a visible cell.
The score
A three-parameter logistic model weighs each item by its difficulty and how well it separates people. A lucky guess on an easy item counts for less than a hard one solved. You get a 95% interval, not just a point.
The scale
The 100 / 15 scale is anchored on a 20,000-person normative simulation and re-checked by an automated calibration suite every time an item changes.

The full method, including the calibration checks, is on the scoring page.

People who took it

1,042 people have taken it today. Rated 4.7 across twelve thousand reviews.

Sarah M. in Austin just finished and scored 107.

“The matrix section is brutal in the best way. First online test that felt like the real thing.”
Maria S., Madrid
“The domain breakdown told me exactly where I'm strong and where I'm slow. Way more than a number.”
David L., Toronto
“Took me 14 minutes. The working memory part had me talking to myself. Report PDF is clean.”
Aiko N., Tokyo

Before or after

What the scale actually says, where the number comes from, and what the items look like.

Before you begin

Find a quiet fifteen minutes. It only counts once.

You can’t pause and you can’t go back, the same as a supervised test. Phone face down, then start.

Start the test