Use the timeline below to select up to 20 seconds to watch or share.
5.3s"It's eight cars long and always carries the same number of passengers in each car.
1.9s"An hour later, a number of passengers...
3.65s"equal to half the number of minutes past the hour get off,
2.6s"but three times as many plus six get on.
3.27s"At the second stop, half the passengers plus two get off,
2.8sbut twice as many get on as got on at the First stop."
1.77soof !
2s
0.43sTicket, please.
1.42sI don't have a ticket.
3.25sCome with me, boy.
0.18sWe've got a stowaway, sir.
3.34sI'll pay. How much ?
0.62s
1.93sTwice the fare from Tucson to Flagstaff...
4.2sminus two-thirds of the fare from Albuquerque to El Paso.
3.2sWhoa !