Mathematical Sets

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Can you name the following mathematical sets given the defining property of each element in that set?

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Property:Mathematical Set:
The product of n(n-1)(n-2)(n-3)...(n-(n-1)), where n is any positive integer.
Any real number which cannot be expressed as a ratio of two integers.
Any number which is equal to n+(n-1)+(n-2)+...+(n-(n-1)), where n is any positive integer.
Any positive integer equal to the sum of its positive divisors excluding the number itself.
The product of any integer n, raised to the power of 2.
Any number which has two constituent parts - a real part and an imaginary part.
Any number which is the sum of the previous two numbers in the series beginning: 2,1...
Any integer which is not evenly divisible by 2.
Any positive real number expressed as a fraction of 100.
Any positive integer (although some people also include 0 as an element of this set).
Any number which is the sum of the previous two numbers in the series beginning: 0,1...
Any real number less than 0.
Any positive integer that is divisible only by 1 and itself.

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