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What is the value of $\dfrac{10^2 + 6^2}{2}$?

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A $16$ B $86$ C $34$ D $68$ E $128$

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Official solution

Simplifying, $\dfrac{10^2+6^2}{2}=\dfrac{100+36}{2}=\dfrac{136}{2}=68$.

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