Question

To which subset of real numbers does -18 NOT belong?
interger
Rational
irrational

Answer 1

The number -18 is an integer, and it is also a rational number (since it can be expressed as -18/1). However, it is not an irrational number, as irrational numbers cannot be expressed as a fraction of two integers.

Therefore, -18 does **not** belong to the subset of **irrational numbers**.