For several months, the **puzzles**THE **mind games** and the **intellectual challenges** are very popular on the Internet and social networks. If you are looking for a challenge that can test your intelligence and problem-solving skills, then this math riddle is for you!

**Your mission for this test is simple:** find the calculation logic and the relationship between the areas of the figure to find the value of the missing number. **Ready to take the challenge ?**

IQ tests are generally designed to test an individual’s ability to solve complex problems and find logical solutions. Intellectual challenges, meanwhile, can range from math puzzles to brain games to sudoku.

## IQ test: complete the series of numbers by finding the logic

IQ tests and puzzles provide **challenges** logics that allow people to boost their cognitive skills. The purpose of these **games** is often to identify the correct **solution from the problem**.

We have to analyze the information and identify the interaction between the different elements to find the answer. Such a challenge can be an IQ test where we have to find the calculation logic and the relationship between the areas to find the value of the missing number.

The key to success is therefore to use adequate strategies and tactics to solve the problem presented. If we can understand the problem and find the right answer, then we can derive personal satisfaction from our ability to overcome this type of challenge.

## The IQ test solution

**The correct answer is 30!** Thank you to everyone who took the time to rack their brains to find the right answer.

**Here is the detail of the calculation logic:**

- 12+15=27,
- 15+11=26,
- 11+18=29
- and 18+12=30

Here are the operations that were necessary to achieve this result.

Do not hesitate to share this challenge with those around you on social networks and encourage your friends to try to find the right answer.