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Problem 6

Number theory Difficulty 1.0 Multiple choice CEMC Gauss (Grade 7) · Canada · 2024

When the four digits of 20242024
are added, the result is

Pick one

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Official solution

Adding the digits of 20242024,
we get 2+0+2+4=82+0+2+4=8.

Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty, ordering) added by this project.