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Can the number $(15)^n$, $n$ being a natural number, end with the digit $0$? Give reasons.
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$15^n = (5 \times 3)^n$
A number ends with zero if it has two prime factors $2$ and $5$ both. Since $15^n$ does not have $2$ as a prime factor, so it can't end with zero
A number ends with zero if it has two prime factors $2$ and $5$ both. Since $15^n$ does not have $2$ as a prime factor, so it can't end with zero