What is the average of the first 9999 natural numbers?

The average of the first 9999 natural numbers

Here we will define and show you the formula and the math to calculate the average of the first 9999 natural numbers.

The first 9999 natural numbers are the whole numbers (integers) that start with 1 and end with 9999. To make a list of the first 9999 natural numbers, you simply count up to 9999.

To get the average of those 9999 numbers, you add them up and then divide the sum by 9999. We created a formula that can calculate the average of any sequence of natural numbers starting with 1. Here is the formula to calculate the average (avg) of the first n natural numbers:

avg = ((n × (n + 1)) ÷ 2) ÷ n

When we enter n = 9999 in our formula, we get the average of the first 9999 natural numbers. Here is the math and the answer:

avg = ((n × (n + 1)) ÷ 2) ÷ n
avg = ((9999 × (9999 + 1)) ÷ 2) ÷ 9999
avg = ((9999 × 10000) ÷ 2) ÷ 9999
avg = (99990000 ÷ 2) ÷ 9999
avg = 49995000 ÷ 9999
average = 5000

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