Question

Is `5` a rational, irrational, natural, whole, integer or real number?

Answer 1

It can be assigned to all above groups except irrational numbers.

Explanation:

1. If a number consists only of digits, it is a natural number.
2. An integer is a natural number or a number with minus sign and digits only.
3. If it can be represented as a fraction, it is rational,
4. If it cannot be represented as a fraction it is irrational.

The sets mentioned in points 2 and 3 include the ones mentioned above (`NN sub ZZ sub QQ`)

Rational and irrational numbers form real numbers set.

`5` consists of digits only so it is natural, but as mentioned above it is also integer, rational and real.