Positive integers are (not is!) a proper subset of natural numbers. The natural numbers comprise positive integers and zero.
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Rational numbers, whole numbers, negative numbers, even numbers, integers
Its a NEGATIVE number. A NEGATIVE INTEGER.
'0' is the only whole number that is not a counting number. Negative integers do not belong to whole numbers.
No. All natural numbers are whole, so they are rational. Irrational numbers like pi and the square root of 34 come in decimals.
9 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