Find the smallest number by which 3645 must be divided so that it becomes a perfect square. Also, find the square root of the resulting number.
3645 = 5 × (3 × 3) × (3 × 3) × 3
Here 5 and 3 are unpaired so we have to divide 3645 with 5 × 3 = 15
Therefore,
= 32 × 32
Hence,
Square root of numbers = 
= 3 × 3
= 9
5