Odd Numbers

An odd number is a whole number that cannot be divided exactly by 2. In other words, when an odd number is divided by 2, there will be a remainder of 1.

Identifying Odd Numbers

To identify whether a number is odd, you can use the following rule:

A number is odd if it is not divisible by 2. This means the last digit of the number is 1, 3, 5, 7, or 9.

Examples of Odd Numbers

Here are some examples of odd numbers:

• 3
• 7
• 11
• 15
• 21

Properties of Odd Numbers

Some properties of odd numbers include:

• When you add or subtract two odd numbers, the result is always an even number.
• When you multiply two odd numbers, the result is always an odd number.

Practice Questions

Now, let's practice identifying odd numbers:

1. Is 9 an odd number?
2. What is the next odd number after 17?
3. What happens when you add two odd numbers together?

Summary

Odd numbers are an important concept in mathematics. Understanding odd numbers and their properties is essential for various mathematical operations and problem-solving.