Yes, 324 is a perfect square. Its prime factorisation is 2 × 2 × 3 × 3 × 3 × 3. These can be grouped into two equal groups. So, 324 = 18 × 18 and its square root is 18.
Class 8 Mathematics Ganita Prakash Chapter 1 A Square and A Cube NCERT solutions
Class 8 Mathematics Chapter 1 A Square and A Cube question answer
Yes, 324 is a perfect square. When we factorise 324, we get 2 × 2 × 3 × 3 × 3 × 3. These factors can be grouped as (2×3×3) × (2×3×3) = 18 × 18. Since all prime factors are in pairs, it confirms that 324 is a perfect square. Thus, √324 = 18. We use this factor pairing method to confirm perfect squares and find their roots.
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