Find the square root of number by using the method of prime factorisation:
Question:

Find the square root of number by using the method of prime factorisation:
729

Solution:

Resolving into prime factors:

$729=3 \times 3 \times 3 \times 3 \times 3 \times 3$

$\therefore \sqrt{729}=3 \times 3 \times 3=27$