|←||086 - Squares and Circles||087 - Ferris Wheel Riddle||088 - In a Hole||→|
There are 10 two-seater cars attached to the fair's Ferris wheel. The Ferris wheel turns so that one car rotates through the exit platform every minute.
The wheel began operation at 10 in the morning and shut down 30 minutes later. What's the maximum number of people that could have taken a ride on the wheel in that time period?
A car comes once a minute for 30 minutes. Two people can ride in each car.
It certainly sounds simple, but it's awfully easy to overlook some important facts surrounding this problem.
For the first nine minutes the Ferris wheel is moving, the cars arriving at the unloading zone are unoccupied. For the last nine minutes of operation, needless to say, no one will be allowed to board the cars.
From the time the Ferris wheel fills up at 10 minutes past the hour until the last passenger steps off at 10:30, a total of 21 sets of passengers will have taken a ride on the Ferris wheel.
|Professor Layton and the Curious VillagePuzzles in|
See here for weekly puzzles
|Puzzle Index: CV · DB · UF · LS · MM · AL · VS|
A big thanks to http://professorlaytonwalkthrough.blogspot.com