Question

Find the smallest number by which 720 should be multiplied so that the product becomes a perfect square.
1. 5
2. 6
3. 3
4. 4

Answer 1

Correct Answer - Option 1 : 5

Given:

Number = 720 

Concept used:

Prime Factorization

Calculation:

By prime factorization, 720 can be written as:

720 = 2² × 2² × 3² × 5

∴ 5 must be multiplied by 720 so that the product (720 × 5 = 3600) becomes a perfect square.