What is IQ?
What intelligence tests measure, how scores are calculated and where they stop.
Read the guideHow do you think?
Every mind solves puzzles differently.
Some people spot number patterns instantly, others see shapes turn in their head or untangle a tricky argument. Read our guides, practise with worked examples and find out which thinking style suits you best.
Start the puzzlesWarm-up puzzle
35917?
Look at the gaps between the numbers.
10 puzzles
Across four thinking styles
About 3 minutes
No account, no time limit
18+ only
For entertainment and practice
Understand first, then play.
Our guides explain how reasoning puzzles work and how to approach them calmly.
Puzzles with worked answers
Four example puzzles, one for each thinking style, solved step by step.
Read the guideFour ways of thinking
Pattern spotting, word sense, visual thinking and deduction explained simply.
Read the guideBrain-friendly habits
Small routines that help you focus when solving puzzles and in daily life.
Read the guideFrequently asked questions
How the puzzles work, the optional call, prices and your privacy.
Read the guideWho runs IQ Thinking
Our approach to puzzles and transparency, and our operator UGC Masters Ltd.
Read the guideClear from the start
A puzzle experience, not an exam.
IQ Thinking is operated by UGC Masters Ltd. The puzzles are designed for fun and practice. They do not replace a standardised test carried out by a qualified professional.
You stay in control.
After the ten puzzles your result is prepared. The detailed explanation is available through an optional, paid, pre-recorded phone service. A call only starts when you choose to make it.
Ready for the first puzzle?
Find a quiet moment. Each puzzle has exactly one answer that fits the rule.