Is this a real IQ test?
No -- and no free online quiz is. A genuine IQ score comes from a standardized test such as the Wechsler scales, given under controlled conditions and compared against a large, representative sample of people your age. That comparison is what turns raw answers into an IQ number. This quiz has no such sample, so it gives you a score out of 15 instead of pretending to know your IQ.
What it does offer is a fair, honest set of the puzzle types IQ-style tests commonly use, with the reasoning behind every answer.
What the questions cover
Number and letter series test pattern recognition. Analogies and the opposite-word question test verbal reasoning. The syllogisms (Bloops and Razzies, Tom the cat) test deduction -- including knowing when something can't be concluded. The bat-and-ball and widget questions are classic "cognitive reflection" items where the first answer that comes to mind is wrong. The painted cube tests spatial reasoning.
How to improve
Pattern and logic puzzles are learnable. Reading the explanations, then attempting similar puzzles a few days later, usually raises scores quickly. Slowing down on questions that feel obvious is the single biggest improvement for most people.
Frequently asked questions
Does this quiz tell me my IQ?
No. It reports how many of the 15 puzzles you solved. An IQ score requires a standardized test normed against a large population, which no free online quiz has.
Is there a time limit?
No. Take as long as you like -- the point is to reason carefully.
Why is the bat-and-ball answer 5 cents?
If the ball were 10 cents, the bat would be $1.10 and the total $1.20. With a 5-cent ball, the bat is $1.05 and the total is $1.10.
Can I retake it?
Yes, as often as you like. The questions stay the same, so a second attempt mostly tests whether the explanations stuck.