The Four Shelves: Petrova, Lindqvist, Tanaka, and Okafor
Verified— unique solution
zebra
Four shelves stand in a row, numbered 1 to 4 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 historian is Okafor.
2. The mystery writer is directly next to the author with the gold cover.
3. The author with the blue cover is immediately to the left of the historian.
4. The author with the blue cover is Tanaka.
5. The mystery writer is Petrova.
6. The author with the white cover is directly next to Petrova.
7. The memoirist is the author with the white cover.
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 (1–4) does “Lindqvist” end up at? Answer with the number.
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