Logic Game
What this game measures
This game exercises inductive reasoning — the ability to look at a set of examples, work out the rule they follow, and apply it to a new case. It is the same analytical muscle that pattern-recognition IQ tests lean on: no outside knowledge, no vocabulary, no arithmetic beyond the obvious, just spotting the structure hidden inside a short problem.
Because the rules are self-contained, the puzzles reward clear thinking over what you happen to have studied. That is precisely why this style of task shows up across cognitive testing — it travels well between languages and backgrounds.
The kinds of puzzle
A session draws 15 puzzles from a bank of 45, spread across 4 families. Each family probes the same underlying skill from a different angle.
- Number series20 in the bankA run of numbers governed by a hidden rule — a step, a ratio, an alternating pattern — with the next value missing.
- Letter series9 in the bankThe same idea in the alphabet: letters advance by a rule you have to spot before you can continue the sequence.
- Analogies9 in the bank“A is to B as C is to ?” — you infer the relationship in the first pair and apply it to the second.
- Odd-one-out7 in the bankFour items share a property and one breaks it; finding the exception means naming the rule the rest obey.
How the score is worked out
Your raw score is the number of puzzles you answer correctly out of 15. We convert that accuracy into a percentile against a normal curve whose mean is 60% correct — so getting about 9 of the 15 right lands you near the 50th percentile, the population midpoint, and a clean sweep reaches the 98th.
That 60% mean is a calibration target for the mixed-difficulty session, chosen to sit at a sensible average — not a figure from a norming study. Read your percentile as an informed estimate of how your reasoning compares, not a clinical result.
Frequently asked questions
Does this game measure IQ?
Not exactly — it exercises inductive reasoning, which is one of the strongest single predictors of general intelligence, but a short game is not a full IQ test. Our 35-question pattern-recognition test is the better estimate; treat this as focused practice on the reasoning it draws on.
Are the puzzles the same every time?
No — each session samples a fresh mix from the 45-puzzle bank, so back-to-back plays rarely repeat. The order of the answer options is shuffled too, which keeps a remembered position from giving anything away on a retake.
Do the puzzles get harder as I go?
Yes — the 15 puzzles come in tiers: 5 easy, then 5 medium, then 5 hard, so the challenge ramps up steadily as you go. The puzzle types stay mixed throughout — an analogy might be followed by a number series — but the difficulty only climbs, it never drops back.
Is the game free?
Yes — completely free, with no account or payment, and it runs entirely in your browser. The site is funded by display ads and optional paid certificates, never by charging for the games themselves.
Keep reading
Want to see how this kind of reasoning is measured at full length? These go further.