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Which subset of the real number does pi belong?
It belongs to any subset which contains it. For example,the interval (3, 4){pi}{1, pi, 3/7}{27, sqrt(7), pi}
To which set of numbers does the number -12 belong?
It belongs to any set that contains it: for example, {4.75, -12, pi, sqrt(5), 29}. It belongs to the set of integers which is a proper subset of rational numbers which is a proper subset of real numbers which is a proper subset of complex numbers. So -12 belongs to all the above sets.
Is a prime number a subset of an odd number?
No. There is one even prime.
Does every point on the real number line correspond to a rational number?
No. There are several real numbers that are not rational (e.g. pi). However, every rational number is also a real number. In general, whole numbers/natural numbers is a subset of the integers (i.e. every whole number is an integer), the integers is a subset of the rationals, the rationals are a subset of the real numbers. I think the real numbers are a subset of the complex numbers, but I'm not 100% positive on that.
Are subset numbers whole numbers?
The number of subsets of any set must be a whole number.
