The numbers are perfect square, Let us see As, 144 = 122, 256 = 162, 324 = 182 Similarly, 625 = 252

144, 256, 324

Correct Answer: 625

Explanation:

The numbers are perfect square,
Let us see
As, 144 = 12², 256 = 16², 324 = 18²
Similarly, 625 = 25²

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