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Moving Day (Four Horses in the UK version) is a puzzle in Professor Layton and the Diabolical Box.
Puzzle
You have four horses, all of which travel at different speeds. In traveling form point A to point B, these horses take one, two, four, and six hours respectively.
One day, you decide to move all your horses from point A to point B. However, you can only move a maximum of two horses at a time, and you need to ride a horse back to point A each time you return to move your other horses. Knowing you can only move as fast as the slowest horse you're traveling with, what's the fewest number of hours it will take to complete your move?
Hints
Solution
Incorrect
Too bad!
Think hard about the clues you've been given.
Correct
That's right!
To start, take your one- and two-hour horses. Then ride your one-hour houses back. Next, ride out on your four- and six-hour horses, and return on your two-hour horse. At this point you've been moving for 11 hours--three in the first excursion and eight in the next.
Now you should be back at point A with your one- and two-hour horses. Ride them both across to point B to finish the task in 13 hours.
Professor Layton and the Diabolical Box | Puzzles in||
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