What is pattern recognition on an IQ test?

A type of puzzle where you see a sequence of figures or numbers that change by a rule and choose what comes next. It measures how quickly and accurately you can find and apply a rule in unfamiliar material.

How do you get better at pattern recognition puzzles?

Learn the common rule types, describe each change in words, and check every rule against your chosen answer. Familiarity with the format helps a little, but careful checking helps more.

Are number series a kind of pattern recognition?

Yes. A number series uses the same logic with numbers instead of shapes. On IQ Octopus they have their own section, Quantitative Reasoning.

Guide

Pattern recognition on IQ tests

Pattern recognition puzzles show you a row of tiles that change by a hidden rule and ask what comes next. They are the gentlest way into an IQ test, and also a good test of the habit that matters most on every puzzle type: checking a rule instead of trusting a hunch.

Want your own number? The test is 25 visual puzzles, about 12 minutes, no sign-up.

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What a sequence puzzle asks

You see four or five tiles in a row. The last one is a question mark. Each tile holds one or two simple shapes, and something about them changes from tile to tile. Your job is to find what changes and pick, from the options, the tile that comes next.

That is the format of the first section of IQ Octopus, Pattern Recognition, which has 5 puzzles. You can try one right now on the home page, and there is a fully worked example on the Pattern Recognition practice page.

Puzzles like these test fluid reasoning, the ability to work with material you have not seen before, as opposed to drawing on what you have learned (Wikipedia: Fluid and crystallized intelligence). Doing well on them tends to go with doing well on other kinds of reasoning tasks, which is the overlap psychologists call general intelligence, or g (Wikipedia: g factor).

The rules you will meet

Rotation. A shape turns by the same angle at each step: an eighth of a turn, or a quarter. Watch a landmark, like the point of an arrow, to see the direction.
Count. Elements are added or removed at a steady rate, for example one more dot each step, or two.
Fill. A shape cycles through solid, outlined and striped. After three steps the cycle starts again.
Size. A shape grows or shrinks by a fixed amount.
Position. A shape moves around the tile, for example clockwise from corner to corner.

Color is never part of a rule on IQ Octopus. Everything is drawn in one ink color, so differences in color vision do not matter.

Try one · Pattern Recognition

Which tile comes next?

Tap the option you think is right, or show the answer.

Show the answer

The missing tile shows a tiny outlined arrow pointing up and to the left (option 3).

How to solve it

Compare neighboring tiles and name what changes each time.
From tile to tile, the arrow turns an eighth of a turn counterclockwise.
From tile to tile, the arrow gets smaller.
Everything else stays the same from tile to tile.
The last tile shows a small outlined arrow pointing up. Apply each change once more.
So the missing tile shows a tiny outlined arrow pointing up and to the left.

That was 1 puzzle. The full test has 25.

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How difficulty is built

Sequence puzzles get harder in a predictable way:

One rule. A single shape changes in a single way. Most people spot it within seconds.
Two rules on one shape. The shape turns and also gains a dot each step. Many people find the first rule and stop. The options are designed to catch exactly that.
Two rules on two shapes. Each shape follows its own rule, and you have to track both at once. A longer row of tiles gives you more evidence, but also more to hold in mind.

A step-by-step approach

Compare tile 1 with tile 2. List everything that differs: angle, count, fill, size, position.
Check the list against tile 2 to tile 3. Keep the changes that repeat. Drop the ones that do not.
Look for a second shape or a second rule. If the tiles still differ in a way your rule does not explain, there is more to find.
Build the next tile in your head. Apply every rule one more step and picture the result before you look at the options.
Match and verify. Find the option that matches your picture, then check it against each rule separately.

Here is a worked case. Tile 1 shows an arrow pointing up with one dot. Tile 2: pointing right, two dots. Tile 3: pointing down, three dots. The arrow turns a quarter clockwise each step, and one dot is added. So tile 4 points left with four dots. An option pointing left with three dots gets the rotation right and the count wrong. One pointing up with four dots gets the count right but resets the rotation. Only one option satisfies both rules.

The traps in the options

Wrong options in sequence puzzles are built from a few patterns. Knowing them makes them easy to spot:

One rule wrong. The main trap. Everything is right except one detail, so it rewards people who found only the obvious rule.
The last tile repeated. It looks familiar, but the sequence has to move forward.
The mirror image. The right shape flipped instead of turned. Check the direction of rotation with a landmark.
A plausible stranger. A tile that could belong to the sequence somewhere, just not next.

Number series: the same skill with numbers

A number series asks the same question with numbers: 3, 6, 12, 24, what comes next? The rule might be adding a fixed amount, multiplying, alternating two simpler series, or a pattern in the differences between terms. The method is the same: describe the change, check it holds, apply it once more. IQ Octopus has a separate section for these, Quantitative Reasoning, with its own worked example.

Sources

Fluid and crystallized intelligence. Wikipedia. en.wikipedia.org/wiki/Fluid_and_crystallized_intelligence
g factor (psychometrics). Wikipedia. en.wikipedia.org/wiki/G_factor_(psychometrics)