Free IQ test (for entertainment)
This IQ test has 22 original questions that get harder as you go: number series, logic, vocabulary and mental math. You get a score by category and a fun IQ estimate. It is a brain game, not a clinical test, so it cannot replace an assessment by a licensed psychologist.
- ✅ Free
- 🔒 No sign-up
- 📱 Works on mobile
- ⚡ Instant results
For entertainment only. This test is not an official IQ measurement and does not replace a psychological evaluation.
🔒 Everything runs in your browser. Your data and files never leave your device.
📌 Key facts
- IQ is a scale where the population average is set to 100 and the standard deviation to 15.
- About 68% of people score between 85 and 115, and about 95% between 70 and 130.
- An IQ of 130 or higher applies to roughly 2% of the population.
- A formal IQ test is given by a psychologist, for example with the Wechsler scales (WAIS, WISC).
- This online test is a brain game: its result is for fun and does not replace an assessment by a professional.
What this test covers
The 22 questions cover four kinds of reasoning, each at three difficulty levels.
| Type | Example |
|---|---|
| Sequences | 2, 6, 12, 20, 30, ? |
| Logic | Odd one out, syllogisms, puzzles |
| Verbal | Analogies and opposites |
| Math | Fractions, speed, ages |
Harder questions are worth more points than easy ones, so your score is weighted by difficulty.
How the estimate is calculated
\[ \begin{gathered} \text{ratio} = \dfrac{\text{points earned}}{\text{points possible}} \\ \text{estimate} = 70 + 75 \times (0.6 \times \text{ratio} + 0.4 \times \text{ratio}^{2}) \end{gathered} \]
A standard IQ scale has an average of 100 and a standard deviation of 15, so about 68% of people score between 85 and 115. Our smoothed curve gives a playful idea, but it has not been normed on a population sample.
What a real IQ test adds
- It is normed on thousands of people your age.
- It is taken in controlled conditions with a psychologist.
- It measures several abilities (verbal comprehension, reasoning, working memory, speed).
An online result changes with your tiredness, stress and familiarity with this type of question. It says nothing about your real intelligence, or your worth.
IQ test: how to read a score
An IQ score is relative to the population. The average is 100 and the standard deviation is 15, so most people land close to 100.
| IQ | Approximate share of people |
|---|---|
| 85 to 115 | 68% |
| 70 to 130 | 95% |
| Above 130 | about 2% |
| Below 70 | about 2% |
So a score of 115 puts someone a little above average, nothing more. A score does not tell the whole story, because creativity, memory and practical sense are not all measured.
IQ test: setting up a good session
Your result also depends on how you feel that day. So pick a quiet time and plan on 20 to 30 minutes.
- Get enough sleep the night before.
- Silence your phone notifications.
- Read each question to the end before answering.
- Skip a hard question, then come back to it.
However, do not retake the test ten times in a row. You remember the answers, and your score climbs without any gain in reasoning.
IQ test: what it does and does not mean
An online brain game is for fun and practice. It does not diagnose anything.
For a serious assessment, see a psychologist trained in the recognized scales. Also, a single number never describes a whole person.
If you enjoy this kind of challenge, try the personality test or the typing test. For a logic workout, you can practice with the fraction calculator too.
IQ test: the types of questions
An IQ test explores several abilities. Each type of question measures something different.
- Number series test logical reasoning.
- Vocabulary tests verbal knowledge.
- Mental math tests speed with numbers.
- Analogies test the ability to spot relationships.
For example, in the series 2, 4, 8, 16, you look for the rule: each number doubles. So the next one is 32. A good IQ test mixes these categories, so no single talent drives the score.
Therefore, read your result by category: an IQ test breakdown says more than the total alone.
IQ test: practicing the smart way
You can practice this kind of question without cheating. That way, you gain ease, not just a higher score.
- Solve number series for five minutes a day.
- Read varied texts to build your vocabulary.
- Do math in your head when you shop.
- Play logic games with friends.
Also, these habits help at school and at work. However, no practice truly changes the IQ that an official test measures: it mostly improves your familiarity with the format.
So treat this IQ test as a warm-up for your mind, nothing more.
IQ test: myths worth dropping
Several myths surround IQ. First, IQ is not fixed for life: scores can move a few points with age, sleep and schooling. Second, a high IQ does not guarantee success, because motivation and effort matter a lot. Third, one online result never defines you.
Also, an IQ test measures reasoning on specific tasks. It does not measure kindness, humor or artistic taste. So enjoy the quiz, learn from your breakdown, and then move on to something else.
3 real-life examples
A number sequence
"2, 6, 12, 20, 30, ?": the gaps are 4, 6, 8, 10, so the next one is \( 30 + 12 = 42 \). The test shows you the explanation at the end.
A score of 15 out of 22
You get 15 right, including most of the hard ones. The weighted score gives an above-average estimate with a breakdown by category.
Retaking the test
You try again a week later: the questions come in a new order but are the same. Your score rises because you know the tricks, not because your IQ changed.