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How Many People? is a puzzle in Professor Layton and the Unwound Future.
Puzzle
- US Version
"I was riding on a double-decker bus, and the tour guide on the upper level told me that, including myself, there were 25 tourists in the lower level and 40% as many tourists in the upper level."
How many people total were in the bus?
- UK Version
"I was on a double-decker bus, and the conductor told me that, including myself, there were 25 passengers on the bottom deck. He also told me that the number of passengers on the top deck was 40% of the number on the bottom deck."
How many people were on the bus in total?
Hints
Solution
Incorrect
Too bad!
- US Version
40% is two-fifths. But even if you get that, there's a catch.
- UK Version
40% is two fifths. But even if you get that, there's still a catch.
Correct
Good job!
- US Version
Thirty-seven people were riding the bus. There were 25 tourists in the lower level, and 40% of that is 10 tourists in the upper level. This amounts to 35 tourists. If you then add the tour guide and bus driver, you get a total of 37 people.
- UK Version
There were 37 people on the bus: 25 passengers on the bottom deck and 40% of that, or 10 passengers, on the top deck. This amounts to 35 passengers.
If you add the conductor and bus driver, you get 37 people in total.
Professor Layton and the Unwound Future | Puzzles in||
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