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, 2001

Number theory Difficulty 1.0 Junior Find the answer Canada

Pierre celebrated his birthday on February 2, 2001. On that day, his age equalled the sum of the digits in the year in which he was born. In what year was Pierre born?

(A) $1987$ (B) $1980$ (C) $1979$ (D) $1977$ (E) $1971$

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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.