Stay curious. Find your next challenge.
Work through a puzzle, learn the reasoning, and try a little more. Explore free logical practice, thoughtful guides, and our original IQ test at your own pace.
Try one before you start
Look at the gap between each number.
No timer here. Give it a go.
Find your starting point
Start with a short practice, follow a guide, or set aside time for the IQ test.
For learning at your pace
Work through clues and follow the reasoning behind each answer. Choose this for a short session with room to try again.
Start with the basics, then combine more clues in the follow-on sets. Free method lessons, explanations, and mistake retries.
Choose a practice set →For a focused challenge
Spot the missing piece in a series of visual patterns. Choose this when you have time to give the questions your full attention.
An online reasoning activity. See the result options and scoring details before you begin.
About the test →From the reading room
Logical Reasoning
Explore six reasoning methods, worked examples, and common mistakes before your next practice session.
Read the guide →
IQ
What does an IQ score describe? Understand the numbers, the comparisons and what a test leaves out.
Read the guide →
Curious minds
Why is the average IQ 100? What happens while you sleep? Follow a question into our collection of short tidbits, each with context and a source to explore.
The brain · Energy · Sleep · Learning · IQ
Explore the tidbitsExplore logical reasoning through free practice and worked explanations, read about thinking and the brain, or try our original IQ test. Start with a short practice set and follow the topics that interest you.
Logical practice includes free scores and explanations. Taking the IQ test is free; its start page explains the result available in that version. Any paid detailed-result option shows its price at checkout before you pay.
No. The IQ activity uses fixed scoring tables without a published validation study. Paying for a detailed result reveals the table score; it does not make the assessment more accurate.
Start with logical practice sets 1–3 to learn the basics. Sets 4–6 combine more clues and test assumptions. These describe the intended progression, not a measured difficulty rating. Choose Learn mode for help as you go.
No. You can start directly. Logical practice saves only your latest session on this browser, when storage is available. Starting another set replaces it; clearing browser data removes it. Progress does not sync across devices.
Open Learn the method before starting a set. In Learn mode, review the method or use a hint before checking your answer. You can retry mistakes after finishing. Return to the practice page and choose Resume practice or View result for your latest saved session.
Choose a ten-question set and a mode. Learn mode explains each answer as you go. Challenge mode lets you review all the explanations at the end. Both are untimed and free.
It shows how many questions you answered correctly in that set. It is a learning score, not an IQ estimate.
