It looks incredibly easy, but one tiny mistake changes the answer completely.

9 + 9 × 2 − 9 = ?

Most people rush through it from left to right and end up with the wrong result. The key is remembering the order of operations: multiplication comes before addition and subtraction.

The correct answer is 18.

Here’s the trick:

• 9 × 2 = 18
• 9 + 18 = 27
• 27 − 9 = 18

Did you get 18, or did this puzzle fool you?