Did you get it right?
This chalkboard puzzle asks you to solve the expression carefully: 7 + 7 x 3 – 7 = ?
The Answer
The correct answer is: 21.
Here is why
- Do the multiplication first: 7 x 3 = 21.
- Then add the first 7: 7 + 21 = 28.
- Then subtract the last 7: 28 – 7 = 21.
Why people miss it
The fast left-to-right answer is tempting, but multiplication comes before addition and subtraction.
What answer did you get before checking?
