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, 2003

Number theory Difficulty 3.0 AMC 10/12 Find the answer Canada

The people of Evenland never use odd digits. Instead of counting 1, 2, 3, 4, 5, 6, an Evenlander counts 2, 4, 6, 8, 20, 22. What is an Evenlander's version of the integer 111?

(A) $822$ (B) $828$ (C) $840$ (D) $842$ (E) $824$

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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.