Do you think you’re smart? Good, than, with no google or cheating, try to solve this riddle of the car parking lot number in 20 seconds:
So have you done it? It was easy or it turn your head upside down? Sometimes the most simple problems, turn out to be the more difficult ones, and in here you have an example. Still think you’re smart? This is a question from an Hong Kong Elementary School Admission test, if you weren’t able to answer, then you cannot be admitted, sorry. eheheh.
Oh, by the way, the answer is 87, you just had to turn the image upside down!