The Five Shelves: Petrova, Moreau, Lindqvist, Vásquez, and Tanaka
Verified— unique solution
zebra
Five shelves stand in a row, numbered 1 to 5 from left to right. Each holds exactly one of each attribute, and no attribute repeats. Work out the full arrangement from these clues:
1. The author whose book holds a feather is somewhere to the left of the mystery writer.
2. The science-fiction writer is the author with the gold cover.
3. The author whose book holds a postcard is somewhere to the left of the author whose book holds a ticket stub.
4. The science-fiction writer is not Petrova.
5. The author whose book holds a pressed leaf is not Lindqvist.
6. The author whose book holds a pressed leaf is immediately to the right of Vásquez.
7. The author whose book holds a ticket stub is not the cookbook writer.
8. The author with the red cover is immediately to the right of the historian.
9. The author whose book holds a receipt is immediately to the right of the cookbook writer.
10. The author with the green cover is immediately to the right of the author whose book holds a ticket stub.
11. The mystery writer is not the author with the red cover.
12. The author with the blue cover is immediately to the right of the author with the white cover.
13. Petrova is immediately to the left of Moreau.
14. The author with the white cover is somewhere to the left of Lindqvist.
15. The poet is not the author whose book holds a postcard.
Hints
Hint 1
Hint 2
Hint 3
Solution
Commit an attempt to unseal the proof. Write your answer — right or wrong, thinking it through is the point.
In the final arrangement, which numbered shelf (1–5) does “Petrova” end up at? Answer with the number.
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