You’ve probably seen headlines like “Only people with a high IQ can solve this math puzzle” spreading across social media. These puzzles are designed to look intimidating, but they usually test something more specific than intelligence: attention to detail, logical thinking, and the ability to spot patterns.

A person’s ability to solve a puzzle does not determine their IQ. Many factors—such as experience, familiarity with puzzles, concentration, and problem-solving strategies—can affect performance.

That said, these puzzles can be a fun way to challenge your brain.

Try This Puzzle

Can you find the missing number?

2 + 3 = 10

4 + 5 = 36

6 + 7 = 78

8 + 9 = ?

Take a moment before looking at the answer.

The Solution

The trick is to look for the hidden pattern.

For the first equation:

2 + 3 = 10

A possible pattern is:

$$(2+3)\times 2=10$$

For the second:

$$(4+5)\times 4=36$$

For the third:

$$(6+7)\times 6=78$$

Following the same pattern:

$$(8+9)\times 8=17\times 8$$ $$=136$$

So the answer is:

8 + 9 = 136

But Is There Only One Correct Answer?

This is where many viral “IQ puzzles” become interesting.

Mathematically, a few examples are not enough to prove a single rule. Many different patterns can fit the same equations.

For example, another person might discover a completely different formula that also works for the first three lines but gives a different answer for the fourth.

This is an important lesson in mathematics:

Finding a pattern is not the same as proving a rule.

Good problem-solving requires asking:

• Does the pattern work consistently?
• Is it the simplest explanation?
• Are there other possible solutions?

Why These Puzzles Are Popular

Brain teasers like these are popular because they encourage:

• Logical reasoning
• Creative thinking
• Mental flexibility
• Careful observation
• Pattern recognition

They are enjoyable exercises, but they are not reliable tests of intelligence.

A high IQ does not mean someone automatically solves every puzzle, and struggling with a puzzle does not mean someone lacks intelligence.

Final Challenge

Here’s another one:

If:

1 + 4 = 5

2 + 5 = 12

3 + 6 = 21

4 + 7 = ?