Well, isn't that just a happy little question! The greatest perfect square of 1290 is 36, because 36 x 36 equals 1296, which is the closest perfect square to 1290. It's all about finding the beauty in numbers and appreciating the little surprises they bring.
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1,290 is not a perfect square. The approximate square root is ± 35.916569992136
The perfect square of 75 is 5625. Not sure of the relevance of "greatest", though.
8747
650 has no factor that is a perfect square, other than 1.
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