Two students taking chemistry class were doing well enough to think they had solid “A” grades. Confident of their chemistry knowledge, they decided to party with some friends the weekend before the final.
When they returned to late to take the exam, they explained to their professor that they missed the text because of flat tire. The professor allowed them to make up the final the next day. When they arrived, the professor handed each a test, then placed them in separate rooms. Opening the small booklets, the student found just one question : wich tire?
Source: Contact (Photo: fotosearch)