**Definition of Odd Number**

- An odd number is a whole number that is not divisible by 2.

{1, 3, 5, 7, 9, . . . .} is the set of odd numbers.

**More about Odd Number**

- An odd number is a whole number that is not a multiple of 2.
- An odd number is a whole number that has 1, 3, 5, 7, and 9 in the ones place.

**Examples of Odd Number**

- The following are few examples of odd numbers.

27, 55, 89, 45, 99, 221, 999, 100,375

**Solved Example on Odd Number**

Find the probability of getting an odd number, when a number cube is rolled.

Choices:

A.

B.

C.

D. 1

Correct Answer: C

Solution:

Step 1:Number of favorable outcomes = number of odd numbers = 3

Step 2:Total number of possible outcomes = numbers on the cube = 6

Step 3:Probability (getting an odd number) = [Simplify.]

**Related Terms for Odd Number**

- Whole Number
- Divisible
- Multiple