This problem was shared on Facebook with the claim that only one in a thousand could figure it out.
It went viral and generated over 3 million comments.
Here is the problem.
If 1 + 4 = 5, 2 + 5 = 12, 3 + 6 = 21, what is 8 + 11 = ?
This video presents what many people believe to be the correct answer.
Did you figure it out correctly before looking at the answer?
