By what number should 81 be divided to get a perfect cube?

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Solution

Explanation: The prime factorisation of 81 will be:
81 = 3 × 3 × 3 × 3
81 = 3³ × 3
Hence, we need to divide 81 by 3 to get :
$\frac{81}{3} = 27 = 3^{3}$

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