Intellectual puzzles and challenges have always fascinated social networks, and this **math challenge** is one of the most difficult. Internet users are invited to find the calculation logic to find the missing number in this star series, and to do it in less than 45 seconds. Passing this IQ test requires a good dose of concentration and logic.

**This challenge is to find the missing number in a short time. Will you be one of the geniuses who find the solution in less than 45 seconds?**

## IQ test: Discover the calculation logic to find the missing number in this star series

IQ tests **and the puzzles** are stimulating challenges that serve to test problem-solving ability. In particular, when it comes to finding the missing number in a star series, **you have to concentrate** to find the **calculation logic**.

These tests and puzzles can help stimulate our brain and improve our cognitive abilities. In this type of test, it is important to take your time to understand the principle and find the right solutions. Therefore, when we pass an IQ test or a riddle, it can give us great satisfaction.

Solving IQ tests and riddles is a stimulating challenge to test our problem-solving ability. To find the missing number in a star series, it is essential to concentrate well and find the right calculation logic. Taking your time and understanding the principle can help overcome this challenge and get great satisfaction when we manage to overcome it.

## The solution to the challenge

Congratulations to everyone who took up the challenge and found the correct answer, which is 72! You had to understand the following logic: 8×8-8, 7×7-7, 11×11-11 and therefore 9×9-9=72.

Thank you for your time spent trying to find the solution. Why not share this challenge with those around you on social networks? So you can have fun together and test their logical skills.