Did you get it right?
This black-board puzzle asks you to use parentheses before multiplication and subtraction.
The Answer
The correct answer is: 16.
Here is why
- First solve 8 + 4 = 12.
- Then multiply 7 x 12 = 84.
- Finally 100 – 84 = 16.
Why people miss it
The phrase NOT 20 makes people second-guess themselves, but the order of operations gives a clear answer.
What answer did you get before checking?
