Using the numbers 1 through 100 how many are odd numbers?

Answer 1

There are 50 odd numbers and 50 even numbers between 1 and 100. The odd numbers 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