Odd Numbers

Odd numbers are whole numbers that cannot be divided evenly 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 simply divide it by 2. If the remainder is 1, then the number is odd. For example:

5 ÷ 2 = 2 with a remainder of 1, so 5 is an odd number.

8 ÷ 2 = 4 with no remainder, so 8 is not an odd number.

List of Odd Numbers

Here is a list of the first 10 odd numbers:

• 1
• 3
• 5
• 7
• 9
• 11
• 13
• 15
• 17
• 19

Properties of Odd Numbers

Odd numbers have some unique properties:

• When two odd numbers are added together, the sum is always even.
• When two odd numbers are multiplied together, the product is always odd.
• The difference between two odd numbers is always even.

Practice Questions

Now that you've learned about odd numbers, here are some practice questions for you to test your understanding:

1. Is 17 an odd number? (Answer: Yes, because 17 ÷ 2 = 8 with a remainder of 1)
2. What is the next odd number after 27? (Answer: 29)
3. What is the product of two odd numbers? (Answer: An odd number)