The Three Shelves: Okafor, Lindqvist, and Petrova

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logic grid

Three authors — Okafor, Lindqvist, and Petrova — each have exactly one cover colour and bookmark, and no two share any of them. Match each author to their cover colour and bookmark from these clues: 1. Okafor is not the author whose book holds a postcard. 2. The author with the green cover is the author whose book holds a postcard. 3. Lindqvist is not the author with the green cover. 4. Okafor is not the author whose book holds a feather. 5. The author with the white cover is the author whose book holds a ticket stub.

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 matching, which cover colour goes with “Petrova”? Answer with just the cover colour.

Hints

Solution

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