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, 2008

Number theory Difficulty 3.0 AMC 10/12 Prove it Canada

If $(a, 9, 5)$ is an O'Hara triple, determine the value of $a$ .

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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.