Prime and odd numbers
-5 to a set number is -5
10 belongs to the natural integer numbers
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.
173 belongs to the set of positive natural numbers and it also belongs to the set of prime numbers.
The number -4 belongs to the set of all integers. It also belongs to the rationals, reals, complex numbers.
It belongs to the set of prime numbers
It belongs to the set ofrational numbers,decimal fractions,improper fractions (in decimal form),real numbers,complex numbers,quaternions.
To any set that contains it! It belongs to {-5}, or {-5, sqrt(2), pi, -3/7}, or all whole numbers between -43 and 53, or multiples of 5, or negative integers, or rational numbers, or real numbers, or complex numbers, etc.
To any set that contains it! It belongs to {-3.15}, or {-3.15, sqrt(2), pi, -3/7}, or all numbers between -4 and +5, or negative numbers, or rational numbers, or real numbers, or complex numbers, etc.
Rational numbers and Real numbers
5 belongs in the sets: -Natural number set, positive whole numbers -Integer number set, whole numbers -Rational number set, numbers that are not never ending -Real number set, basic numbers without i and that can be expressed in say amounts of apples -Complex number set, the set that contains both real and unreal numbers
30 belongs to the set of natural numbers