The Five Shelves: Tanaka, Okafor, Petrova, Vásquez, and Lindqvist
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 receipt is somewhere to the left of Vásquez.
2. The cookbook writer is not the author with the paperback.
3. The author whose book holds a ticket stub is immediately to the left of the poet.
4. The author whose book holds a pressed leaf is somewhere to the left of the poet.
5. Petrova is immediately to the left of the poet.
6. The historian is somewhere to the left of the author with the hardback.
7. The historian is immediately to the right of the author with the leather-bound edition.
8. The mystery writer is directly next to Tanaka.
9. The author with the paperback is immediately to the right of the historian.
10. The author whose book holds a ticket stub is immediately to the left of the author with the cloth-bound edition.
11. Lindqvist is somewhere to the left of the cookbook writer.
12. Lindqvist is somewhere to the left of the poet.
13. The mystery writer is immediately to the left of the author whose book holds a ribbon bookmark.
14. The author whose book holds a receipt is immediately to the right of Okafor.
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 “Lindqvist” end up at? Answer with the number.
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