Classifying Numbers

Natural numbers are the set of positive integers starting from 1, 2, 3, and so on.

No, 0 is not considered a natural number.

Whole numbers are the set of non-negative integers, including 0 (0, 1, 2, 3, ...).

Integers are whole numbers that can be positive, negative, or zero (-3, -2, -1, 0, 1, 2, 3, ...).

A rational number is any number that can be expressed as a fraction $$\frac{a}{b}$$ where $$a$$ and $$b$$ are integers and $$b \neq 0$$ .

Yes, 1.5 can be expressed as $$\frac{3}{2}$$ .

An irrational number cannot be expressed as a simple fraction; its decimal representation goes on forever without repeating (e.g., $$\pi$$ , $$\sqrt{2}$$ ).

Yes, $$\sqrt{4} = 2$$ , which is a rational number.

Whole numbers include 0 and positive numbers, while integers include both positive and negative numbers.

No, -5 is not a whole number; it is a negative integer.