What is the 45th smallest positive odd number?

Answer 1

Assuming, by number you mean integer, otherwise this is impossible to solve (i.e., there are an infinite amount of even numbers between 0 and 1 alone, e.g. 0.00002, ...., 0.00900208002, etc.).

The definition of odd is given by 2n+1, where n is an integer.

So if n=0: 2(0)+1 = 0 + 1 = 1

When n is 0, you get the first "smallest" positive integer, therefore when n is 45 you'd actually get the 46th smallest positive real integer.

Therefore, the 45th smallest positive odd number is given by:

2(45-1)+1 = 2(44)+1 = 88 + 1 = 89

Note: the "-1" represents offsetting the numbers, because we begin counting at zero.

The answer is 89.