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The Four Weights is a puzzle in Professor Layton and the Last Specter. The puzzle must be solved in order to progress the story.
Puzzle
- US Version
A rack contains nine identical-looking weights ranging from 1 kg to 9 kg. Four of these weights were removed from rack and arranged side by side. One pair of side-by-side weights had a weight difference of 8 kg, while two pairs had a weight difference of 7 kg.
Which weights were removed from the rack, and how were they arranged?
- UK Version
A rack contains nine identical-looking weights, ranging from 1 kg to 9 kg. Four of these weights were removed from the rack and arranged side by side. One pair of side-by-side weights had a weight difference of 8 kg, while two pairs had a weight difference of 7 kg.
Which weights were removed from the rack, and how were they arranged?
Hints
Solution
Incorrect
- US Version
Too bad!
Check your work to make sure you haven't made any miscalculations.
- UK Version
Too bad.
Check your work and make sure you haven't made any miscalculations.
Correct
Excellent!
There are two possible answers: 8, 1, 9, 2 or 2, 9, 1, 8. The only way to get the 8 kg difference is to have the 1 kg and 9 kg weights next to each other.
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