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IQ test: These extraordinary questions reveal your intelligence

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Whether out of curiosity or to prepare for an interview: you can check your cognitive abilities with an IQ test! Speed ​​and logical thinking are the main ingredients that you need. Anyone who thinks mathematical puzzles are enough will be disappointed. Intelligence and logical thinking also show up in being able to draw the right conclusions. You can check how well you succeed with our IQ test ...

➠ Content: This is what awaits you

➠ Content: This is what awaits you

Free IQ test including resolution

Many IQ tests are very extensive and take a long time to complete. This can be necessary for a very detailed and precise analysis. However, it is just as appealing to solve various tasks in an IQ test and see how far your own skills go. Below we have put together 20 questions, riddles and tasks for you with which you can test yourself or which serve as an exercise for an IQ test. (The solutions to the test can be found in a PDF at the end.)

With an IQ test you are always pressed for time. Imagine a stopwatch to control yourself. Try to complete the tasks in no more than 10 minutes. Since some of the questions can be answered quite quickly, this should be feasible. Those looking for a more challenging task can cut the time and try to complete the tasks in just six or seven minutes. Here we go…

1. Which number does it continue?

Take a close look at the following series of numbers. Your task is to fill in the missing number with which the series continues. If necessary, you can use a calculator.

5 – 25 – 7 – 49 – 31 – ?

2. How do you have to weigh?

You have a total of nine spheres that look completely identical and are the same size, as well as a classic scale with two weighing pans. One of the balls is heavier than the other eight. How do you find out which of the balls is the heaviest when you are only allowed to weigh twice?

3. Who is it?

A man who has neither a brother nor a sister looks at a family picture. He thinks: The father of the person pictured is my father's son. Who is he looking at in the picture?

4. How much does it cost?

You go to the supermarket and buy exactly two products. A yogurt and an apple. Together they cost 1.10 euros. The apple costs 1 euro more than the yogurt. How much does the yogurt cost?

5. Who is the youngest?

Anna is older than Felix and Klaus is older than Julia. Anna and Julia are the same age. Who is the youngest

6. How long does it take?

Weeds grow in large quantities in an unused field. The weeds are doubling every day and within 26 days the entire field is covered with weeds. How long does it take for the weeds to cover half of the field?

7. What's right?

Two statements are made that are considered to be true: “All birds have wings.” And: “All wings are made of feathers.” Which of the possible answers is a logical conclusion from the above statements?

➠ A) All birds can fly.
➠ B) If birds can fly, they need their wings.
➠ C) All birds have feathers.
➠ D) There are birds that don't have wings.
➠ E) If a bird has feathers, it can fly.

8. How old am I?

You meet a girl and have to guess how old she is. As a tip, you will receive a riddle, the solution of which will lead you to the answer: In 15 years I will be four times as old as I was 3 years ago. How old is the girl

9. Which switch belongs to which lamp?

You are in a room with three light switches that belong to three lamps that are in the next room. You cannot see the lamps and their light from your room. You are only allowed to enter the adjoining room with the lamps once - how do you find out which switch goes with which lamp? You have to match all three correctly!

10. How much do you have to drink?

They have a wine cellar with a total of 200 bottles. 99 percent of all bottles are red wine, the rest is white wine. How many bottles do you have to drink to reduce the proportion of red wine to 98 percent?

11. Which day are you looking for?

Which day is the day after tomorrow if the day before yesterday was the day after Tuesday?

12. What is the underlying rule?

Look at the following series of numbers from 1 to 9:

8 – 3 – 1 – 5 – 9 – 6 – 7 – 4 – 2

These are not arranged at random, but according to a clear rule. What is this?

13. What does the series of numbers look like?

You should set up a series of numbers yourself: The first number is four, each further number in the sequence is exactly one greater than half of the next number. The result is a sequence in this scheme: 4 -? -? -? -? -? -? What does the series of numbers look like for the first seven digits?

14. How do the terms relate to one another?

In the following you will be shown three terms, you have to add the fourth. There are two pairs of terms and you have to complete the second with the appropriate word in analogy to the first.

Lizard: crawl - butterfly -?

The choices are: tumbling, pupating, peacock butterfly, fluttering, sucking, wings, developing or metamorphosis

15. Which term are you looking for?

One of the following terms has the same meaning as ambivalent: intrepid, doubtful, ambiguous, ambitious, controversial.

16. What was it about?

This task is a concentration test: Do you still know - without looking - what the second task was about? If not, go ahead, you might think of it later.

17. Which word is wrong?

Below you can read several terms, one of which does not fit the rest - which one is it?

Pond - North Sea - river - body of water - swimming pool - pond - stream

18. Which term is an antonym?

Find the right contrast to gallophobia:

➠ cacophony
➠ Cholelithiasis
➠ Francophilia
➠ homophilia
➠ antipathy

19. How do you make the correct analogy?

Tree is to forest like a brook is to ...

➠ source
➠ ocean
➠ lake
➠ river
➠ puddle
➠ sea

20. Which number must follow?

Finally, a series of numbers. Complete the last digit:

324 – 108 – 36 – 12 – ?

The solutions to the IQ test

How long did it take you? Did you solve everything correctly? In this free PDF you will find the answers and solutions to the test.

IQ test: tasks from different areas

Still not enough of questions from an IQ test? Then we have an extensive list with many more questions and tasks that you can expect in an IQ test. You can use this to practice for an IQ test, to test and train your cognitive abilities yourself or simply because you have fun thinking. If you want to challenge yourself, you should set a timer again. We recommend around five minutes per task block.

Linguistic analogies in the IQ test

  • Tuesday: Friday = September:?
  • top: bottom = horizontal:?
  • South America: Brazil = Europe:?

    a) limit
    b) North Rhine-Westphalia
    c) Germany
    d) Alps
  • Multiplication: Division = Addition:?
  • Number: digit = word:?

    a) sentence
    b) text
    c) Scripture
    d) letter
  • Km / h: speed = second:?

    a) minute
    b) time
    c) Calendar
    d) day
  • Book: Pages = Wall:?

    a) build
    b) bricklayer
    c) stones
    d) wall

You can find the solutions in this free PDF!

Logical sequences of numbers in the IQ test

➠ 22 – 19 – 16 – 13 – ?
➠ 4 – 3 – 5 – 2 – 6 – ?
➠ 69 – 59 – 51 – 45 – ?
➠ 121 – 11 – 16 – 4 – 9 – ?
➠ 1 – 1 – 2 – 3 – 5 – ?
➠ 48 – 16 – 21 – 7 – ?
➠ 25 – 17 – 34 – 26 – ?
➠ 1 – 2 – 4 – 5 – 25 – 26 -?

The solutions to these tasks in the IQ test are available here in the free PDF!

Logical relationships in the IQ test

  • Which word does not match the other?

    a) run
    b) swim
    c) stand
    d) fly
  • Which school subject does not fit in this list?

    a) biology
    b) German
    c) chemistry
    d) physics
  • Which country does not match the others?

    a) Poland
    b) Belgium
    c) France
    d) Sweden
  • Which city does not match the other?

    a) Berlin
    b) Moscow
    c) New York
    d) London
  • Which word does not match the other?

    a) strong
    b) strong
    c) huge
    d) muscular
  • Which part of the body does not fit on this list?

    a) heart
    b) eyes
    c) ears
    d) nose

The solutions to these tasks in the IQ test are available here in the free PDF!

Letter puzzle in the IQ test

  • Which city is hidden in the letters?

    b) MBHRGU
    c) ÜCHNME
  • Which plant can be formed from the letters?

    a) TLAPE
    c) GEDMO
    d) HZANTI
  • What animal can you find in the letters?

    a) MSHARET
    c) NGPIU
    d) MISEA
  • Which letter sequence does NOT result in a word?

    a) ONEBD
    b) FARED

The solutions to these tasks in the IQ test are available here in the free PDF!

More brain teasers, logic tests and IQ puzzles

While the IQ test is typically very logical, there are other brain jogging puzzles and tasks that sometimes require more creative solutions. Do you want to try it? Then we recommend our extensive article with even more logic puzzles, puzzles and challenges. These differ a little from the more classic questions in the IQ test and rather require the ability to think outside the box. You can still try to train your cognitive skills. Read on here: Unconventional thinkers: definition, advantages, tips

What is the normal IQ?

The IQ is a standard value that can only be determined in comparison with other people of the same age:

➠ IQ score of 100: Average intelligence.
➠ IQ score above 135: above-average intelligence.
➠ IQ score below 70: Below average intelligence.

However, there is a tolerance range. Fluctuations of up to 10 points in both directions, i.e. an IQ of 90 or 110, still count towards the extended average. Above-average intelligence is equated with giftedness, a below-average IQ value with intellectual disability. These values ​​are not static across generations. Research knows the so-called Flynn effect. According to this, the measured intelligence quotient increases by 10 points per generation. The reason for this is the better access to education of today's generations. While an IQ of 100 would have been at the upper end of the measurement scale 60 years ago, it means average today.

Frequently asked questions about the IQ test

Finally, we have summarized and answered some particularly frequent questions about the IQ test in a small FAQ for you.

IQ test in children: a good idea?

Parents would like to know how the intelligence of their own offspring is doing. Therefore, some consider taking an IQ test on children. This is quite possible, for example there are IQ tests for children in kindergarten or school age. Whether the IQ test is useful for children depends heavily on the individual case. In any case, you should keep in mind that such a test is also associated with great pressure for children. Not only in the IQ test for children themselves, but also afterwards.

A good result can significantly increase the pressure to perform, a bad result could permanently damage self-confidence. The decision to take an IQ test for children should therefore never be made recklessly or rashly. It is advisable to only carry out such an examination in consultation with the pediatrician, the class teacher or the educators in the kindergarten. They will have a better understanding and knowledge of whether such an IQ test makes sense and can provide you with the necessary information.

How did the IQ test come about?

The idea of ​​making intelligence measurable has existed for a long time. As early as 1904, the two French scientists Alfred Binet and Théophile Simon developed the first modern IQ test on behalf of the French Ministry of Education. Using five questions for each age group, they tried to identify the level of intellectual development of a child in comparison to other peers. For example, if an eight-year-old could solve tasks for nine-year-olds, he was assigned a higher intelligence age (IA). However, this test has been criticized by other experts. We owe the development of the IQ, the intelligence quotient, to the German psychologist Wilhelm Stern. He came up with the idea of ​​dividing the intelligence age by the age and then multiplying the result by a hundred.

What is intelligence anyway?

There is no one-size-fits-all definition of intelligence. In psychology, this collective term generally stands for the cognitive performance of a person. Researchers differentiate more precisely between fluid intelligence and crystalline intelligence. While fluid intelligence describes mental flexibility, problem-solving skills and logical thinking, crystalline intelligence encompasses factual knowledge, general education and the collective experience of a person. According to the intelligence researcher Elsbeth Stern, intelligence means that someone can use their previous knowledge to derive new knowledge and draw conclusions from it. Essentially, two theories of intelligence compete with each other:

General Intelligence Theory
The theory of general intelligence goes back to the British psychologist Charles Spearman. He observed on various IQ tests that those who did well in one test tended to do well in other tests as well. From this he concluded that different components apparently have something to do with one another, i.e. correlate. He called this general factor, which seems to play a role in all tests, the general factor (also called the G factor).

Theory of multiple intelligences
The theory of multiple intelligences goes back to the American educational scientist Howard Gardner. He found the previous approaches to intelligence research inadequate. People can have excellent language skills, but fail in mathematical tasks. According to Gardner, for example, empathy is part of interpersonal intelligence. He sees nature-related intelligence in people who are particularly in harmony with animals and nature. Critics attribute some of the skills described as intelligence to the area of ​​social competence.

Which areas are examined in an IQ test?

There are around 70 different IQ tests. All of them encompass different areas of intelligence. These are decisive: logical-mathematical area, linguistic-linguistic area, pictorial-spatial area. These areas are covered with verbal, numerical and pictorial tasks. The ability to remember and analyze as well as the speed of a person is tested. Logical thinking has long since shown itself not only in mathematical tasks: syllogisms (as in question 7 in the above IQ test) can also be used to determine whether someone can recognize connections or hide useless information. Social skills or personality, on the other hand, are not taken into account in classic IQ tests. So what someone does with their intelligence cannot be inferred from an IQ test.

How meaningful is an IQ test?

The fundamental problem of IQ tests: How can intelligence be measured if the term is not even clearly defined? In addition, there is no standardized IQ test. The result depends on the questions asked. This does not mean that an IQ test is a waste of time or not meaningful at all. Rather, it increases the responsibility of the people behind an IQ test, i.e. researchers and questioners. You have to develop suitable procedures and evaluate the results in a consistent and transparent manner. We have put together for you in this PDF which points of criticism and factors can influence the informative value of an IQ test.

Can I train for an IQ test?

Yes, it is entirely possible to prepare specifically for an IQ test. The more often you repeat certain tasks, the better you will get at it - and of course the better the result of the IQ test will be. It is questionable whether this makes sense. This may make an IQ test less meaningful and skew the result.

Can intelligence be increased and trained?

Lots of puzzles, brain jogging and regular IQ tests to check your development and to further train the tasks - does this increase your intelligence? Unfortunately the answer is: no! You will get better in the trained areas, but there will be no transfer effects. Fluid intelligence in particular even decreases with age instead of increasing. Only increased concentration has a positive effect. Ideal for this: meditation, reading, avoiding stress.

Does a bad IQ test mean I'm stupid?

The IQ test has been completed, you will receive an evaluation and a result that is below average. Before you feel bad and fear that you are stupid: An IQ test only ever relates to certain areas of intelligence, your strengths may be elsewhere - but this does not show up in the result. In addition, the result can be negatively influenced by tiredness, illness or simply a bad day.

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