IQ Test Questions Explained: The 5 Question Types and How to Solve Them

Most IQ tests look intimidating until you realise that they are built from a handful of recurring question types. Each type targets a different part of reasoning, and each one follows rules you can learn to spot. Below are the five types you are most likely to meet — with worked examples and the strategies that help most.

Why IQ tests use puzzles instead of general knowledge

Early intelligence tests leaned heavily on vocabulary and school knowledge, which mostly rewarded education. In 1938 John C. Raven published his Progressive Matrices: visual puzzles in which you complete a pattern. They need no reading and little prior knowledge, so they measure what psychologists call fluid intelligence — the ability to solve problems you have never seen before. Most modern online IQ tests, including the IQtonics test, are built on the same idea and extend it with numbers, logic, spatial and memory tasks.

1. Pattern and matrix questions

You see a 3×3 grid of figures with the last cell empty and choose the figure that completes it. The grid is governed by one or more rules that apply across rows (and often down columns). The most common rules are:

• Progression: something increases or decreases step by step — number of dots, size, shading.
• Rotation: a shape turns by a fixed angle, for example 45° or 90° per cell.
• Distribution of three: each row contains the same three shapes or colours in a different order.
• Addition or subtraction: the third figure is the first two overlaid, or what remains when shared lines are removed.

2. Number series and symbol equations

Number questions test whether you can find the rule behind a sequence. Take this series:

2, 6, 12, 20, 30, ?

The gaps are 4, 6, 8, 10 — each one grows by 2 — so the next gap is 12 and the answer is 42. Another classic uses two interleaved patterns:

3, 10, 5, 12, 7, ?

Here the steps alternate +7 and −5, so the answer is 14. Symbol equations work the same way with shapes instead of numbers: if ▲ + ▲ = 10 and ▲ + ■ = 9, then ▲ = 5 and ■ = 4.

3. Logic questions

Logic questions ask you to deduce something that is never stated directly. Two formats are especially common.

Ordering. “Ada is older than Ben. Cem is younger than Ben. Deniz is older than Ada. Who is the second oldest?” Put the facts on one line — Deniz > Ada > Ben > Cem — and the answer, Ada, is obvious. Writing (or visualising) a line prevents most mistakes.

Hidden operations. “If 3 ◆ 4 = 13 and 5 ◆ 2 = 11, what is 6 ◆ 3?” Test simple combinations until one fits both examples: 3 × 4 + 1 = 13 and 5 × 2 + 1 = 11, so ◆ means “multiply, then add 1” and 6 ◆ 3 = 19.

4. Spatial reasoning and mental rotation

Spatial questions show a figure and ask which option is the same figure turned, or which one is its mirror image. This “mental rotation” task was made famous by Shepard and Metzler in 1971, who found that the time people need grows with the angle they have to rotate — we really do turn objects in our mind’s eye.

The trick is that wrong answers are usually mirror images, which no amount of rotation can match.

5. Memory questions

Working-memory questions show you something briefly — a set of shapes, positions or numbers — then hide it and ask you to recall or manipulate it. Research suggests adults can hold only about four meaningful chunks in working memory at once, so these tasks feel hard for everyone.

How IQ test questions are scored

In most tests, questions get harder as you progress, and harder questions count for more. On IQtonics, 40 questions cover the five areas above; your weighted score is placed on the standard IQ scale (mean 100, standard deviation 15) and turned into a percentile. If you are unsure what a given score means, our guide on what counts as a good IQ score explains the full chart.

With 40 questions in 20 minutes you have about 30 seconds per question on average. Early questions take less, so you can bank time for the hard ones at the end — but don’t let a single puzzle eat three minutes.

Can you practise IQ test questions?

Yes, and it helps — mostly because familiar formats let you focus on the problem instead of on the instructions. Studies of retesting consistently show modest score gains from practice. That’s worth remembering in both directions: practising is a fair way to show your best, but a practised score also reflects familiarity.

A good routine is short and regular: 10–15 minutes a day of mixed puzzles, reviewing the explanation for every mistake. Knowing why an answer is right is what turns practice into skill.

Checklist before you start a test

1. Sleep well and take the test when you are alert.
2. Find a quiet place and silence notifications for 20 minutes.
3. Read each question fully before looking at the answers.
4. Predict the answer first, then compare with the options.
5. Keep moving — difficulty rises, and time is best spent at the end.