5 is a natural number, as it is an integer greater than zero. It is a whole number, an integer, and a rational number.
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It is rational, whole, integer and real but not natural nor irrational.
45 is real, rational, whole, natural, odd, composite, and an integer.
Rational, whole and integer. Some mathematicians consider it a natural number, others do not.
It is all of the except irrational.
It is a real rational negative integer number whose value is -3