At first glance, this looks like one of the easiest math questions you’ll ever see:
10 − 4 × 2 = ?
Many people confidently answer 12, while others say 2.
So who’s right?
Let’s break it down.
Why So Many People Get It Wrong
The mistake comes from solving the equation from left to right without following the correct order of operations.
Some people do this:
10 − 4 = 6
6 × 2 = 12
That seems reasonable—but it’s not how standard mathematics works.
The Correct Rule: Order of Operations
In mathematics, operations must be completed in this order:
- Parentheses ( )
- Exponents
- Multiplication and Division (from left to right)
- Addition and Subtraction (from left to right)
This is often remembered with acronyms like PEMDAS or BODMAS.
Step-by-Step Solution
The equation is:
10 − 4 × 2
Step 1: Multiply first
4 × 2 = 8
Now the equation becomes:
10 − 8
Step 2: Subtract
10 − 8 = 2
✅ Correct Answer: 2
Why 12 Is Incorrect
If you answered 12, you solved the subtraction before the multiplication:
10 − 4 = 6
6 × 2 = 12
Unfortunately, that ignores the standard order of operations used worldwide.
A Quick Way to Remember
Whenever you see multiplication and subtraction together:
✔️ Do the multiplication first.
Example:
- 15 − 3 × 4 = 15 − 12 = 3
- 20 − 5 × 2 = 20 − 10 = 10
- 8 + 6 ÷ 2 = 8 + 3 = 11
Following this rule will help you avoid common mistakes.
Final Answer
🎉 10 − 4 × 2 = 2
Did you get it right on your first try?
Share this puzzle with your friends and see who remembers the order of operations. You might be surprised how many people confidently choose 12 before realizing the multiplication should come first!
