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Two of the same numbers that can be multipied and make a number example: the square root of 100 is 10 because 10 multipied by 10 = 100
A [perfect] square number, by definition, has a factor which is its square root. As a result it CANNOT be a prime!
The square root of 100 is 10.
The geometric mean of 25 and 100 is the square root of 2500 which is 50. In general, the geometric mean of n numbers is the n-th root of the product of the numbers.