Odd Numbers 1 to 12
2026-02-28 17:10 Diff
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Last updated on August 5, 2025

The numbers that cannot be divided equally into two parts are the odd numbers. Mostly, odd numbers of people are used in breaking ties for election. We are discussing “Odd Numbers 1 to 12” in this topic.

Odd Numbers 1 to 12

Odd numbers can be classified into two types – composite odd numbers and consecutive odd numbers.

The numbers that have factors more than two and greater than 1 are called composite numbers.

When a composite number is not divisible by 2, it is called a composite odd number. For example, 9 is a composite odd number.

The pair of odd numbers that have a difference of 2 are called consecutive odd numbers. For example, 3 and 5 are consecutive odd numbers.

Odd numbers follow these properties. Odd numbers always end with 1, 3, 5, 7, or 9.

When you add two odd numbers, the result is always an even number.

Multiplying two odd numbers always gives another odd number.

The square of any odd number is always an odd number.

Odd Numbers 1 to 12 Chart

The pictorial representation helps children learn odd numbers easily.

By using this chart, children can know the sequence and series of numbers.

Let’s take a look at the odd number chart, ranging between 1 and 12.

List of Odd Numbers 1 to 12

Odd numbers are not divisible by the number 2.

To find odd numbers, we can use the formula: (2n + 1) where n is an integer. For example, if n = 2 then 2n + 1 = 2(2) + 1 = 4 + 1 = 5, which is an odd number.

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Fun facts about odd numbers

1. Squaring an odd number, meaning multiplying an odd number by itself, always gives an odd number. For example, the square of 3 is 3 × 3 = 9, which is an odd number.

2. When you add odd numbers starting from 1, the total becomes a perfect square. For example, adding odd numbers from 1 to 7: 1 + 3 + 5 + 7 = 16, which is a perfect square.

3. Prime numbers are the numbers that have only two factors: 1 and the number itself. Let’s take a look at a list of odd numbers from 1 to 12 1, 3, 5, 7, 9, 11.

Sum of Odd Numbers 1 to 12

For the sum of odd numbers, a simple formula is used - Sum of odd numbers = n2 Here, n = 6 because there are 6 odd numbers from 1 to 12.

Substitute n = 6 into the formula, we get The sum of odd numbers from 1 to 12 = 62 = 36

Subtraction of Odd Numbers 1 to 12

When you subtract one odd number from another, the result is always an even number. Odd – Odd = Even Example: 11 – 3 = 8 From the above example, 11 and 3 are odd numbers.

When we subtract 3 from 11, we get 8, which is an even number.

Odd Prime Numbers 1 to 12 The positive numbers having exactly two factors, 1 and themselves, are called prime numbers.

The prime numbers which are not divisible by 2 are called odd prime numbers.

All prime numbers other than 2 are odd numbers. Example for odd prime numbers: 3, 5, 7, 11.

A few points to remember for odd numbers are as follows

- The smallest odd prime number is 3. Excluding 2, all prime numbers are odd.

The smallest positive odd number is 1. 36 is the total of all odd numbers from 1 to 12.

Problem 1

Find the 4th odd number.

Okay, lets begin

(2 × 4) - 1 = 8 - 1 = 7 The 4th odd number is 7.

Explanation

To find the 4th odd number, we are using the formula 2n - 1 where n is the nth number.

By substituting n = 4 into the formula, we get the 4th odd number as 7.

Well explained 👍

Problem 2

Calculate the sum of odd numbers from 1 to 7.

Okay, lets begin

The sum of odd numbers from 1 to 7 is 16.

Explanation

To calculate the sum of odd numbers from 1 to 7, we use the formula n^2. Here, n = 4 because there are 4 odd numbers from 1 to 7. By substituting n = 4 into the formula, we get 4^2 = 16.

Well explained 👍

Problem 3

Calculate the number of odd numbers divisible by 3 between 1 and 12.

Okay, lets begin

The number of odd numbers that are divisible by 3 between 1 and 12 is 2.

Explanation

Odd numbers divisible by 3 between 1 and 12 are 3 and 9. Therefore, there are 2 such numbers.

Well explained 👍

Problem 4

Sarah bought 9 apples. She gave 5 of the apples to her friend. How many apples does Sarah have currently?

Okay, lets begin

9 (odd) - 5 (odd) = 4 (even). Sarah currently has 4 apples.

Explanation

Subtracting 5 apples from 9 apples, we get the number of apples that were left with Sarah, i.e. 9 - 5 = 4.

This obeys the subtraction property of odd numbers, which states that the difference between two odd numbers is always an even number.

Well explained 👍

FAQs on Odd Numbers 1 to 12

1.1. Write the last odd number in the sequence from 1 to 12.

The last odd number in the sequence from 1 to 12 is 11.

2.2. What is the product of two odd numbers?

The multiplication of two odd numbers always results in an odd number.

3.3. What is the difference between two consecutive odd numbers?

The difference between two consecutive odd numbers is always 2.

4.4. Check if 9 is an odd number.

Yes, 9 is an odd number because it is not divisible by 2.

5.5. What is the smallest odd prime number?

The smallest odd prime number is 3.

Important Glossaries for Odd Numbers 1 to 12

  • Composite numbers: The numbers greater than 1, having more than two factors, are called composite numbers. Example: 9 is a composite number because it is divisible by 1, 3, and 9.
  • Perfect square: It is a number that is the product of a number multiplied by itself. Example: 9 is a perfect square number because it is obtained by multiplying 3 with 3 (3 × 3).
  • Odd prime numbers: The prime numbers that are not divisible by 2 are called odd prime numbers. Example: 5 is an odd prime number because 5 is a prime number, and it is not divisible by 2.
  • Consecutive odd numbers: A pair of odd numbers with a difference of 2. Example: 5 and 7 are consecutive odd numbers. Odd number: A number not divisible by 2. Example: 7 is an odd number.

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Hiralee Lalitkumar Makwana

About the Author

Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.

Fun Fact

: She loves to read number jokes and games.