Riddle: What has one foot on each side and one in the middle?
This riddle is so tricky that you may find it hard to understand even after you find out the answer. The word yardstick has several meanings and it is used both figuratively and literally. In this riddle here, it is used in its literal meaning which is a graduated measuring stick three feet (0.9144 meters) long.
It is accurately a square of siding to which each edge measures one foot. Thus, each side of the square is one foot in length. For this reason, the answer of this riddle is a yardstick. The answer of this riddle is a yardstick.
The answer is: A yardstick.