The numbers which are used for counting from one to infinity are called Counting Numbers.
Counting numbers are also called as natural numbers.

There are 7 apples in the basket shown above.
A. 30
B. 9
C. 0
D. 10
Correct Answer: C
Step 1: The numbers which are used for counting from one to infinity are called counting numbers.
Step 2: 30, 9, and 10 are counting numbers.
Step 3: So, 0 is not a counting number.
Q1: Which of the following is NOT a counting number?
Q: Is zero a counting number?
A: No, zero is not a counting number. Counting numbers start at one.
Q: Are fractions counting numbers?
A: No, fractions are not counting numbers. Counting numbers are whole numbers.