Bart: [reading a test question] The 7:30am express train travelling at 60 miles an hour leaves Santa Fe bound for Phoenix,

Bart: [reading a test question]
The 7:30am express train travelling at 60 miles an hour leaves
Santa Fe bound for Phoenix, [chews on his pencil] 520 miles away.
Ms.K: Shhh! [points to her head] Visualize it, Bart!
Bart: [visualizing in black-and-white] At the same time, the local
train travelling 30 miles an hour and carrying 40 passengers
leaves Phoenix bound for Santa Fe. It is eight cars long and
always carries the same number of passengers in each car. [Bart
counts five passengers on the train car (the number hovering over
each passenger's head) and visualizes 40 / 8 = 5. The train
travels through a numerical landscape.] An hour later, a number of
passengers equal to half the number of minutes past the hour get
off, and three times as many plus six get on. [Bart and his
equation are trampled by the passengers.] At the second stop, half
the passengers plus two get off, but twice as many get on as got
on at the first stop. [Trampled again. Bart spits out a number.]
Train conductor: Ticket, please.
Bart: I don't have a ticket!
Train conductor: Come with me, boy.
[drags Bart off. Numbers circle Bart's head]
We've got a stowaway, sir.
Bart: I'll pay! How much?
[the train engineer is... Martin! Shoveling numbers into the
engine.]
Martin: Twice the fare from Tuscon to Flagstaff minus two thirds of the
fare Albuquerque to El Paso! Ha-ha-ha-ha!!!!!
-- Math is Hell, "Bart the Genius"