Natural Number :

All the counting numbers are called natural

number.

{1,2,3,---------n}

Whole Number :

When natural numbers are started with zero(0) then these numbers are called whole number.

{0,1,2,3,-----------n}

Point to be remember: 

1. All the natural numbers are whole number but all the whole number are not natural number .

2. Natural Numbers are group of - 

(a) Rational Number

(b) Irrational Number

(c)Whole Number

(d) Intizer Number .

3. Natural Number are represented as symbols N.

Question.

1. Difine which number is natural number

a.3\2

(b) .34

C. 34 

d. 0

Answer - C (34)

Solutions:

Option a : it is a rational number because it is a written in form of ratio or in decimal form (1.5).

Option b:

It is written in decimal number (because 3 & 4 comes after point).

Option c: 

It is a natural number because it is a combination of natural number as unit and ten did it (10×3+1×4 = 34 ).

Option d: 

Zero is a whole number.