How many even numbers between 1 and 30? How many even numbers between 1 and 30? You could just make a list of all the even numbers between 1 and 30 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 30.

We start by determining the first even number and last even number between 1 and 30. The numbers between 1 and 30 start with 2 and end with 29. That means that the first even number is 2 and the last even number is 28.

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 30?"

N = (Last - First + 2) ÷ 2
N = (28 - 2 + 2) ÷ 2
N = 28 ÷ 2
N = 14
Even numbers between 1 and 30 = 14

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