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**The test** we are presenting is a very famous IQ test. Did you know that **IQ tests** are only 70% reliable?

In fact, all it takes is for you to go from one mood to another for the result to change. This means that if you are sad, you will not get the same results as if you were enthusiastic.

## Find the missing value if you are smart

**This test** is particularly difficult and is for adults only, as it requires a great deal of reasoning and thinking.

**You have to understand the logic of the set of numbers and deduce the result that must fill in the blank.** This test is a good test of your problem-solving skills, but it also tests how far you can think your way through a problem. Remember, in IQ tests, logic can sometimes go beyond the rational.

It is necessary to use your imagination to **find the number that should be in place of the question mark.**

Be careful, **you only have 40 seconds to find the answer**. The pressure is great, but keep your cool and concentrate on the numbers you are given. Remember, it is important to consider all the options and not get distracted by unimportant details.

## How do I find the right number?

Finding the right number may seem impossible, but with an open mind and some logic, you can find it. To help you, here are our tips: **there are no calculations to make or complex operations to perform to find the solution.**

However, it is important to take all the numbers into account and analyze them to come to a conclusion. To solve this puzzle, you must first use your logic.

Then you need to look at various possible solutions. It also helps to ask the right questions and explore different hypotheses to find the solution. The key to this puzzle will surprise you once you get the result.

The clock is ticking! You have 40 seconds and not a second more, good luck!

### The solutions to this test

**In this puzzle, the missing number is either 0 or 16.** The reason?

The square was made up of numbers from **1 to 15, which left the option of starting the series with 0 or ending it with 16.** This may seem like an easy answer once we’ve given you the answer. Indeed, as mentioned earlier, you had to find the answer by thinking far ahead.