**This challenge** was designed to challenge your brain in less than 20 seconds! Math puzzles actively stimulate your intelligence, improve your cognitive responsiveness and develop your intellectual aptitude.

By participating in **this is** Fast, you engage your mind in an engaging exercise that strengthens logic and math skills.

The benefits of** brain teaser** on mental health are undeniable. In addition to bringing pleasure, they also promote the production of neurotransmitters while improving concentration and memory.

So, ready to challenge your brain? Test yourself now and discover the many facets of your intelligence in the blink of an eye!

**How does the challenge work?**

In this puzzle, you’ll have to juggle a series of cryptic numbers, each revealing a crucial clue to the final problem. Each equation leads to a unique answer, but the test is finding the underlying logic.

**Numbers are like pieces of a mathematical puzzle, and your mission is to decipher the pattern that unites them.**

You have passed this test if you can discover the answer to the last equation. Time puts additional pressure, as a strict limit of 20 seconds is imposed. This allows you to evaluate your speed and efficiency.

**Some practical tips**

To solve this test quickly, adopt these strategic tips. First, analyze the numbers provided as quickly as possible and identify the sequences.

The answers follow a pre-established logic, such as an arithmetic progression or an alternation of numbers. Next, focus on key numbers that might indicate an underlying rule, like squares, multiples, or even/odd numbers.

Also use the principle of elimination by evaluating answer options one by one. An incorrect answer can be ruled out immediately by applying simple rules.

Don’t dwell on one equation for too long, move on to the next one if it seems too complex, then come back to it as time permits. The speed of your thinking is crucial.

**The answer**

To the geniuses who successfully unraveled the mysteries, congratulations! You have brilliantly identified the logic behind the equations and found the correct answer which is 99. Your mental agility and insight are admirable, they illustrate your exceptional intelligence.

3 2 7 the solution is (3Ã—2)+1 = 7

5 4 23 the solution is (5Ã—4)+3 = 23

7 6 47 the solution is (7Ã—6)+5 = 47

9 8 79 the solution is (9Ã—8)+7 = 79

** 10 9 99 the solution is (10Ã—9)+9 = 99**

For those who haven’t discovered the answer, remember that each puzzle is an opportunity to develop your abilities.

The path to the solution can sometimes be winding, but each attempt strengthens your intellectual resilience. Continue to challenge yourself, explore new concepts, and practice regularly. Mastery of math puzzles comes with practice and perseverance.