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# Examples of Odd Numbers

When we talk about odd numbers, we can define them as the group of numbers that cannot be divided by 2 . This means that the odd numbers are integers that are divisible by some numbers other than 2. Thus, the odd numbers can be of the form:

2n + 1 or 2n-1 , where n is an integer.

### Properties of odd numbers

• A highlight property, odd numbers are always divisible by the same number and by 1; which means that unlike 2, all primes are odd. Example: 3, 5, 7, 11, 13 and 17.

Although, the reverse is not true; there are odd numbers that are not prime . Example, 9; fifteen; 18; 9; 121;

• The sum of an even number plus an odd number gives us an odd number as a  result. Examples: 2 + 3 = 5; 4 + 23 = 27.
• Whereas, if we add two odd numbers , the result is an  even number. Example: 7 + 9 = 16; 21 + 33 = 54.
• The odd numbers can end with either of these numbers:  1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31.

### Consecutive odd numbers

This term is not so well known, but it is also important to understand. The  odd – numbered  row  are given by adding the last two amounts to the previous even number. Examples:  5, 7 or; 151  and  153.

### How do even numbers differ from odd numbers?

The basic difference between odd and even numbers is based on the divisibility by the number two, that is, odd numbers do not support division by two. In this sense, these numbers have as the last digit 1, 3, 5, 7 or 9.

### Special odd numbers

These are the numbers called primes with the only exception of the number 2 which is an even number. In this sense, we say that it is about those natural numbers that cannot be divisible with other numbers than themselves or 1.

When adding or subtracting an even number with an odd number, the result will always be an odd number. The same happens with multiplication, that is, when multiplying an odd number by another equal, the result will be odd.

1. 1
2. 3
3. 5
4. 7
5. 9
6. eleven
7. 13
8. fifteen
9. 17
10. 19
11. twenty-one
12. 2. 3
13. 25
14. 27
15. 29
16. 31
17. 33
18. 35
19. 37
20. 39
21. 41
22. 43
23. Four. Five
24. 47
25. 49
26. 51
27. 53
28. 55
29. 57
30. 59
31. 61
32. 63
33. 65
34. 67
35. 69
36. 71
37. 73
38. 75
39. 77
40. 79
41. 81
42. 83
43. 85
44. 87
45. 89
46. 91
47. 93
48. 95
49. 97
50. 99

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