It turns out that a number being odd is almost inevitable. How do we know that? Well, take a look at this sequence: 1 2 3 5 4 7 9 11 13 6 ... As you can see,

It turns out that a number being odd is almost inevitable. How do we know that? Well, take a look at this sequence: 1 2 3 5 4 7 9 11 13 6 ... As you can see, there's a lot of odd numbers between every even number, and the fraction of even numbers falls and falls as you keep going. Therefore, virtually every number is odd...