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, 2003

Combinatorics Difficulty 1.0 Junior Find the answer Canada

The words “PUNK CD FOR SALE” are painted on a clear window. How many of the letters in the sign look the same from both sides of the window?

(A) $3$ (B) $4$ (C) $5$ (D) $6$ (E) $7$

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty) added by this project. Solutions are the publisher's, linked not copied.