Instead of studying for the last exam of their college careers, the four seniors spent the night partying in the house they had rented off-campus. The next morning they waited until the test was be almost finished, and then they made their way to class. Along the way they all put grease on their hands to support the story they were going to tell their professor.

The class was almost done with the exam when all four seniors burst into class. They told the professor that they had had a flat tire along the way, and could they please retake the test? The professor said that he was a reasonable man, so he scheduled a testing date the following week.

Their plan had worked! They studied diligently for the next week, making the most of their time. The day of the make-up came, and they were ready for anything.

The first question, worth 5 points, was easy. The second question was worth 95 points. It simply read, "Which tire?"