"The Test" joke

Two college seniors had a week of exams coming up. However, they decided to go to a party instead and they didn't get any studying done.

When they went to the test, they decided to tell the professor that their car had broken down the night before due to a flat tire and they needed a bit more time to study.

The professor told them that they could have another day to study.

That evening, both of the boys crammed all night until they were sure that they knew just about everything.

Arriving to class the next morning, each boy was told to go to separate classrooms to take the exam. Each shrugged and went to two different parts of the building.

As each sat down, they read the first question.

"For 5 points, explain the contents of an atom."

At this point, they both thought that this was going to be a piece of cake, and answered the question with ease.

Then, the test continued... "For 95 points, tell me which tire it was."