**Odd numbers 1 to 100** consist of all odd numbers that come between 1 to 100. Odd numbers are the counting numbers whose last digit (or ones place digit) is 1, 3, 5, 7, or 9. In other words, these numbers cannot be equally divided into pairs. It can also be said that the numbers that are not even numbers are odd numbers. For example, 51, 23, 67, 89 are a few numbers that come in the category of odd numbers 1 to 100. There are a total of 50 **odd numbers between 1 to 100**. Let us learn more about **odd numbers from 1 to 100**.

1. | Odd Numbers 1 to 100 Chart |

2. | Sum of Odd Numbers from 1 to 100 |

3. | FAQs on Odd Numbers 1 to 100 |

## Odd Numbers 1 to 100 Chart

A chart of odd numbers from 1 to 100 will help you to list down all odd numbers from 1 to 100. This is made with the help of a simple formula in which we add 2 to the previous odd number to obtain the next odd number. For example, if we add 2 to the first odd number, i.e., 1, we get 1 + 2 = 3, which is the next odd number in the given chart. Similarly, 3 + 2 = 5, 5 + 2 = 7, 7 + 2 = 9, and so on. The last number in the chart of odd numbers 1 to 100 given below is 99, as, if we add 2 to 99, we will get 101 which is greater than 100. So, 99 is the last odd number in the list of odd numbers from 1 to 100.

## Sum of Odd Numbers from 1 to 100

The sum of all odd numbers from 1 to 100 can be found by using the formula, S = n/2(first odd number + last odd number), where n is the total number of odd numbers from 1 to 100. There are a total of 50 odd numbers , so n = 50. So, by substituting the values, we get,

S = n/2(first odd number + last odd number)

S = 50/2(1 + 99)

S = 25 × 100

S = 2500

So, the sum of all odd numbers from 1 to 100 is 2500.

### Even and Odd Numbers 1 to 100

There are 50 even numbers and 50 odd numbers from 1 to 100. The list of even numbers from 1 to 100 can be given as follows: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70,72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100.

The list of odd numbers from 1 to 100 can be given as follows: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99.

### Odd Prime Numbers from 1 to 100

We know that prime numbers are numbers that have only 2 factors, 1 and the number itself. And odd numbers are those numbers that are not divisible by 2. It is to be noted that there are some odd numbers that are not prime numbers like, 9, 15, 21, 25 and so on. And 2 is a prime number but it is not an odd number.

So, if we need to prepare a list of odd prime numbers from 1 to 100, we can write it as follows: 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, and 97. This means there are a total of 24 odd prime numbers from 1 to 100.

**Important Notes on Odd Numbers**

- 99 is the greatest two-digit odd number.
- There are a total of 50 odd numbers between 1 to 100.
- 1 is the smallest odd number.
- Numbers that are not even numbers, are odd numbers.
- The sum of all the odd numbers from 1 to 100 is 2500.
- The average or mean of all odd numbers between 1 to 100 is 50.

**☛Related Topics**

- Even and Odd Numbers
- Natural Numbers
- Whole Numbers
- Real Numbers
- Rational Numbers
- Cardinal Numbers

## FAQs on Odd Numbers 1 to 100

### What are the Odd Numbers 1 to 100?

**Odd numbers from 1 to 100** are all those numbers, within this range, that are not divisible by 2. The odd numbers from 1 to 100 are: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99.

### How to Find the Sum of Odd Numbers 1 to 100?

The sum of all odd numbers between 1 to 100 is 2500. This can be calculated using a formula, Sum = n/2(first odd number + last odd number). Here, 'n' is the total quantity of numbers within this range. We know that there are 50 odd numbers between 1 to 100, in which 1 is the smallest and 99 is the greatest odd number. So, by applying these values in the formula: S = n/2(first odd number + last odd number), we get, S = 50/2(1 + 99) = 25 × 100 = 2500.

### What is the Average of Odd Numbers 1 to 100?

The average of odd numbers 1 to 100 is 50. This is calculated by using the formula of average, which states that Average = Sum of all values/Total number of values. Here, the sum of values is 2500 and the total number of odd numbers from 1 to 100 is 50. So, average = 2500/50 = 50. Therefore, 50 is the average of odd numbers 1 to 100.

### How to Find Odd Numbers 1 to 100?

To find the odd numbers, we use the formula 2n -1, where n is the count of the odd number. For example, if we want to know the first odd number, we substitute the value of n = 1, so, the first odd number is (2 × 1) - 1 = 1, if we want to know the second odd number between 1 to 100, we substitute the value of n = 2, so, the second odd number is (2 × 2) - 1 = 3, if we want to know the 50th (last) odd number between 1 to 100, we substitute the value of n = 50, so, and the 50th odd number will be (2 × 50) - 1 = 99.

### Which is the Largest Odd Number in the List of Odd Numbers 1 to 100?

99 is the largest odd number in the list of odd numbers from 1 to 100. The next odd number will be 101 which is greater than 100. So, 99 is the greatest two-digit odd number.

### How many Odd and Even Numbers are there from 1 to 100?

There are a total of 50 even numbers and 50 odd numbers from 1 to 100.

The list of even numbers from 1 to 100 is given as follows: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64, 66, 68, 70,72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92, 94, 96, 98, 100.

The list of odd numbers from 1 to 100 is given as follows: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99.