ExplanationLet us rewrite n as 5k + r.

Quantity A becomes 5k + r

Quantity B becomes 5k + r + 10 or 5(k+2) +r

Dividing each by 5 Quantity by 5 and checking remainder

Quantity A: \(k + \frac{r}{5}\)

Quantity B: \((k+2) +\frac{r}{5}\)

Quantity A has remainder r.

Quantity B has remainder r as well.

Hence both quantities are equal. Thus C is the right option.
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Sandy

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