Maths Olympiad Prep

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Problem 1

Algebra Difficulty 1.0 Multiple choice CEMC Gauss (Grade 8) · Canada · 2013

The value of 102+10+110^2+10+1 is

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Official solution

Evaluating, (5×3)2=152=13.(5\times3)-2=15-2=13.

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