MCQ
By what number should 81 be divided to get a perfect cube?
- ✓$3$
- B$6$
- C$7$
- D$9$
✓
Answer
Correct option: A.
$3$
The prime factorisation of 81 will be: $81=3 \times 3 \times 3 \times 3$ $81=3^{3} \times 3$ Hence, we need to divide $81$ by $3$ to get: $81 / 3=27=3^{3}$
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