Most people like to think they're pretty smart, but the math problem below will show just how bright you are. Can you spot the mistake in it?
Did you figure it out? If so, congrats! If not, scroll down for the answer:
.
.
.
.
.
.
.
.
.
.
The word "mistake" is spelled wrong on the sign. How smart do you feel now?
Photo Credit: Getty
