Quick IQ test

What you just took

The quick test is a tasting menu. Each of its ten questions comes from one of the six puzzle formats the full IQ Octopus test uses, so in five minutes you see everything the longer test will ask of you. The order runs from easy to hard:

1. An easy shape sequence: what comes next?
2. An easy 3x3 matrix: which tile completes the grid?
3. An easy number series: find the rule, pick the next number.
4. A mental rotation item: the turned figure, not the mirror image.
5. An odd-one-out set: which figure breaks the shared rule?
6. A figure analogy: A is to B as C is to what?
7. A medium matrix.
8. A medium number series.
9. A hard sequence, usually with two rules at once.
10. A hard matrix, with up to three rules.

One tip per format

Because you get one or two of each, there is no time to warm up. A single habit per format goes a long way:

• Sequences: compare the first two tiles only, list every difference, and check it on the next pair.
• Matrices: read row one, confirm on row two, glance down the columns, then describe the missing tile in words before looking at the options.
• Number series: write the gaps between neighbors. If the gaps are messy, look at every other number.
• Rotation: track one landmark, then check that the part beside it stays on the same side. Mirror images swap sides.
• Odd one out: ignore size, tilt and fill. Count sides, or look at where the dot sits.
• Analogies: name every change from A to B, including small shapes moving around the edge.

If you only have a minute per format

Think of the ten questions as five pairs. The first pair (a sequence and a matrix) checks whether you can find a rule in shapes. The second pair (a number series and a rotation) moves to numbers and to picturing movement. The third pair (odd one out and an analogy) asks you to compare several figures and describe a difference exactly. The last four repeat the most common formats at a harder level.

If you finish a pair feeling lost, that tells you which section of a longer test will need the most care. If you finish feeling rushed, the formats are fine and the clock is the issue; untimed practice on worked puzzles is the fix.

Why ten questions cannot give you an IQ

It is tempting to want a number from a quick test, and some sites will print one. We do not, for a plain statistical reason. Every score has measurement error, and short tests have more of it. Even a full clinical IQ test, given one to one by a psychologist, is reported with a confidence interval, often around plus or minus 5 points at 95%(Wechsler, 2008). With ten items, a single lucky guess or a single slip moves the result a long way, and a range wide enough to be honest would be too wide to be useful.

There is a second reason. An IQ is a deviation score: it compares you with a large sample of people your age on a scale with a mean of 100 and a standard deviation of 15 (Wikipedia: Intelligence quotient). A practice set has no such sample behind it. So the quick test reports what it can stand behind: a count out of ten and a description of your practice performance.

What the full test adds

The full IQ Octopus test has 25 questions in five sections and takes about 12 minutes for most people. Every attempt is generated fresh, so there is no answer key to look up. Scoring uses a Rasch model, which weighs each answer by how difficult that item is, and the result is an estimated IQ shown with a confidence range rather than a single falsely precise number. It is still an online estimate, not a clinical assessment, and it says so.

Using the quick test well

The best use of the quick test is as a preview. Take it once, cold, to see the formats. Read the tips above for any format that surprised you. Then take the full test while the formats are familiar but the items are new. Do not take the quick test five times in a row and treat the rising score as progress: it is the same ten questions, and you will remember them.

That effect is well documented. Across many studies, retaking a cognitive ability test raised scores by about a quarter of a standard deviation on average, roughly 4 IQ points, and by more when the same form was reused (Hausknecht et al., 2007). A little familiarity is fair preparation. A memorized answer key is not.

Reading your practice score

Look at which questions you missed rather than the total. Misses spread across formats usually mean the clock was the problem; try a single-format set such as the abstract reasoning test or the number sequence test to slow down and learn the rules. Misses bunched at the end mean the stacked rules on hard items are the thing to practice. The puzzle library has every format with worked answers.

Quick test or full test?

If you have five minutes and want to see what IQ-style puzzles feel like, the quick test is the right tool. If you want an estimate of where you stand, with a percentile and a breakdown by area, take the full test. The guide to how online IQ tests work explains what separates a careful online estimate from a quiz that prints a flattering number.