This page is part of the website

Mathematics Goes to the Movies

by Burkard Polster and Marty Ross

**Willie Wonka (1971)**

18:25

Computer thingo

COMPUTER GUY: We are about to witness the greatest miracle of the machine age.
Based on the revolutionary computonian law of probability this machine will
tell us the precise location of the three remaining golden tickets. (Fiddles
with the machine and then reads output.) “I won’t tell, that would
be cheating.” Etc. see clip.

30:00

TEACHER: Pencils ready. Today we are going to learn about percentages and for
an example let’s take the recent unpleasantness. Supposing there were
1000 Wonka bars in the world and during the contest you each opened a certain
number of them that number is a percent. Everyone understand?

ALL KIDS: No

TEACHER: You Madelain Derkin, how many Wonka bars did you open?

KID: About a hundred.

TEACHER: There are ten hundreds in a thousand. Therefore, you opened ten percent.
You, Peter Goff. How many did you open.

KID: 150.

TEACHER: That’s ten percent half over again which makes 15 percent. Charlie
Backett, how many did you open?

KID: 2

TEACHER: That’s easy. 200 is twice 100.

KID: Not 200, just 2.

TEACHER: Two, what do you mean you only opened two.

KID: I don’t care very much for chocolate.

TEACHER: Well, I can’t figure out just two. So, let’s pretend you
opened 200. Now, if you opened 200 Wonka bars, apart from being dreadfully sick,
you’d have used up 20 percent of 1000 which is 15 percent half over again.

WONKA: The invention, my dear friends, is 93 % perspiration, 6% electricity, 4% evaporation, and 2 % butterscotch ripple.

WOMAN VISITOR: That’s 105%