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225 is a perfect squarebecause 225 = 15*15
Technically, every positive number is a square in the real number system, but I assume you mean perfect square. And yes, 225 is a perfect square. 152 = 225
225
15
152 = 225, and 162 = 256 So there can be no integer, k, such that k2 = 250 and that is what defines a perfect square.