Odd One Out Puzzles
Five figures. Four of them share a rule and one breaks it. The trick is that the answer is not the figure — it is the rule, and once you can name it the odd one names itself. Sixty rules to find, and every attempt ends with the shared rule spelled out.
Also known as figure classification and find the odd figure.
Four Figures Share A Rule; One Breaks It
Three of the four figures agree on a rule and one breaks it. Your task is to name the shared rule and point at the breaker. The rule draws on the same attributes as every figure puzzle here — sides, rotation, shading, size, mirroring, inner figure, dots, spokes and corner marks.
How To Solve Odd One Out Puzzles
- Look for the property three figures share.
- Check the candidate rule against all four before trusting it.
- Prefer rules on attributes that are easy to state: count, fill, sides.
- Choose the figure that breaks the rule — not merely the strangest figure.
The odd one is defined by the rule, not by how unusual it looks. Every set here is built so the strangest-looking figure is sometimes the one that belongs.
| Family | What it covers |
|---|---|
| Shape | The outline itself — how many sides, and which shapes count as belonging. |
| Shading | Fills, inside and out. |
| Counting | How many dots or spokes, and whether the count is odd, even or bounded. |
| Inner shape | What sits inside the outline, and whether anything does. |
| Position | Orientation and the travelling corner dot. |
| Size | How big the figure is drawn. |
| Relationships | The hardest kind: no single attribute is shared, but a relationship between two of them is. |
Nine Attributes And Nineteen Relations
Every set is verified against nine attributes and nineteen derived relationships, and the full list is published on this page — the same checks the generator runs. That is the guarantee behind each puzzle: the odd figure breaks a rule you can name, never a coincidence.
Odd One Out Puzzles Frequently Asked Questions
Why can I not find the odd figure by looking for what stands out?
Because everything is designed to stand out. Only one feature is shared by four figures, and that is what identifies the answer. Search for the agreement, not the difference.
Can these puzzles have two right answers?
Not here. Each one is checked against nine attributes and nineteen relationships, and is only shown if exactly one figure is defensible as the odd one.
What if no single feature is shared?
Then look for a relationship between two features — the dot count matching the number of sides, or the inner shape shaded like the outline. Ten of the sixty rules are of this kind.
How many puzzles are there?
There is no fixed number. Each puzzle is rebuilt from the short seed in the page address, so the supply is effectively unlimited.
What is an odd one out question?
Five figures are shown. Four of them share a property — the same shape, an even number of dots, a shape inside, or a relationship such as the dot count matching the number of sides — and one figure breaks it. You have to find the shared rule, and then the odd figure names itself. It is also called figure classification.
Is it free and does it need an account?
It is completely free and there is no account. Nothing is uploaded; your score is kept only in your own browser.
How do you find the odd one out in a set of figures?
Look for what four of them share, not for what one of them has. The odd figure is defined by breaking a rule the rest obey, so start by testing one attribute across the whole set — count the sides, then the dots, then the shading — and stop at the first attribute where exactly one figure disagrees. Picking the figure that simply looks unusual is the commonest way to get these wrong.