THE FINAL

This past fall semester, at Duke University, there were two sophomores who were
taking Organic Chemistry and who did pretty well on all of the quizzes  and the
midterms and labs, etc., such that going into the final they had a solid A.

These two friends were so confident going into the final that the weekend
before finals week, even though the Chem final was on Monday, they decided to
go up to University of Virginia and party with some  friends up there.

So they did this and had a great time.  However, with their hangovers and
everything, they overslept all day Sunday and didn't make it back to Duke
until early Monday morning.  Rather than taking the final then, what they
did was to find Professor Aldric after the final and explain to him why  they
missed the final.

They told him that they went up to UV for the weekend, and had planned to
come back in time to study, but that they had a flat tire on the way back  and
didn't have a spare and couldn't get help for a long time and so were late
getting back to campus.

Aldric thought this over and then agreed that they could make up the final on
the following day.  The two guys were elated and relieved.  So, they studied
that night and went in the next day at the time that Aldric  had told them.
He placed them in SEPARATE rooms and handed each of them a  test booklet and
told them to begin.

They looked at the first problem, which was something simple about free
radical formation and was worth 5 points.  "Cool" they thought, "this is  going to
be easy."  They did that problem and then turned the page.

They were unprepared, however, for what they saw on the next page.

It said: (95 points) Which tire?