A brain teaser is a type of puzzle or problem designed to challenge the way you think and test your problem-solving skills.
Unlike traditional math or logic problems, brain teasers often require creative thinking, pattern recognition, and lateral reasoning to find the solution. They can come in various forms, such as riddles, visual puzzles, or tricky math equations that don’t follow conventional rules.
Brain teasers are popular in IQ tests, educational games, and even job interviews to assess critical thinking abilities. They help improve cognitive function, enhance memory, and boost problem-solving skills by encouraging you to think outside the box.
Brain Teaser IQ Test: Solve the Math Puzzle
This math puzzle follows a hidden pattern rather than conventional arithmetic rules. Observing the given equations, the pattern suggests that instead of traditional addition, the numbers are manipulated differently.
Do you think you have what it takes to crack this brain teaser in record time? Only true math wizards can find the pattern and solve it within 6 seconds! Are you up for the challenge?
The Puzzle
Take a look at the equations below:
- 22 + 4 = 24
- 13 + 6 = 16
- 80 + 2 = 82
- 67 + 9 = ??
At first glance, these equations don’t seem to follow the normal rules of addition. So what’s the hidden logic?

Source: brainfans
Brain Teaser with Answer
If you carefully observe, the pattern is:
A + B = A (first number stays the same), but B gets ignored. Instead, the last digit of A is replaced with B.
Let’s apply this rule to verify:
-
22 + 4 = 24 (First digit remains the same, last digit becomes 4)
-
13 + 6 = 16 (First digit remains, last digit turns into 6)
-
80 + 2 = 82 (First digit remains, last digit turns into 2)
Now, solving for the last equation:
67 + 9 = 69
Final Answer: 69

Source: brainfans