ODD NUMBER
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
Video Examples: Even and Odd Numbers
Solved Example on Odd Number
Ques: Find the probability of getting an odd number, when a number cube is rolled.
Choices:
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.]
Quick Summary
- Odd numbers are not divisible by 2.
- Odd numbers have 1, 3, 5, 7, or 9 in the ones place.
🍎 Teacher Insights
Use manipulatives like counters or blocks to visually demonstrate that odd numbers always have one left over when divided into pairs.🎓 Prerequisites
- Whole Numbers
- Divisibility
Check Your Knowledge
Q1: Which of the following is an odd number?
Q2: Which of the following is NOT an odd number?
Frequently Asked Questions
Q: Is 0 an odd number?
A: No, 0 is an even number because it is divisible by 2.
Q: Are negative numbers odd numbers?
A: Yes, negative integers can be odd. For example, -1, -3, -5, etc.