How many odd numbers between 1 and 808?




How many odd numbers between 1 and 808? You could just make a list of all the odd numbers between 1 and 808 and then count them, but what fun would that be?

Instead, we have created this simple process with a small formula to calculate exactly how many odd numbers there are between 1 and 808.

We start by determining the first odd number and last odd number between 1 and 808. The numbers between 1 and 808 start with 2 and end with 807. That means that the first odd number is 3 and the last odd number is 807.

Now you add 2 to the difference of the last odd number and the first odd number, and then divide the sum by 2. Here is the formula and the answer to "How many odd numbers between 1 and 808?"

N = (Last - First + 2) ÷ 2
N = (807 - 3 + 2) ÷ 2
N = 806 ÷ 2
N = 403
Odd numbers between 1 and 808 = 403


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