How many even numbers between 1 and 25? You could just make a list of all the even numbers between 1 and 25 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 even numbers there are between 1 and 25.
We start by determining the first even number and last even number between 1 and 25. The numbers between 1 and 25 start with 2 and end with 24. That means that the first even number is 2 and the last even number is 24.
Now you add 2 to the difference of the last even number and the first even number, and then divide the sum by 2. Here is the formula and the answer to "How many even numbers between 1 and 25?"
N = (Last - First + 2) ÷ 2
N = (24 - 2 + 2) ÷ 2
N = 24 ÷ 2
N = 12
Even numbers between 1 and 25 = 12
Even Numbers Between Calculator
Use the tool below to calculate the number of even numbers between another set of numbers.