Brain & Reasoning Tests
Fun, shareable tests of how you think. Each one gives an instant score, an explanation for every answer, and runs entirely in your browser.
3 tests available
IQ Test
A proper IQ test with a mix of easy to hard questions across number series, logic and verbal reasoning. Choose 10 or 15 questions for an estimated score and percentile.
Decision-Making Test
Ten everyday scenarios that quietly expose common decision biases like sunk cost, loss aversion and anchoring. See which ones caught you out.
Probability Intuition Test
Classic probability puzzles where gut feeling usually fails, from Monty Hall to the birthday paradox, with the real odds explained.
Test How You Think
These are interactive tests of reasoning and judgement, not the usual number crunchers. Take a proper IQ test, find out which decision-making biases quietly trip you up, or see how far your gut feeling for probability is from the real odds. Each test scores you instantly and, more usefully, explains the reasoning behind every answer.
What Makes These Different
- Genuine questions: real reasoning problems and classic puzzles, not filler.
- Learn as you go: every answer comes with a plain-English explanation.
- Private: everything runs in your browser and nothing is saved.
- Shareable: post your score and challenge friends to beat it.
An Honest Note
These are for fun and curiosity. They are built on well-known reasoning questions and puzzles, but they are not clinical or psychological assessments, so enjoy the scores and the explanations without treating them as a formal measure of ability.