Mathnasium Job Assessment Practice Exam 2026 - Free Mathnasium Practice Questions and Study Guide

To find the average of a set of numbers, you first need to add all the numbers together and then divide the total by the quantity of numbers you have. In this case, you would add 2, 4, 6, and 8 together:

2 + 4 + 6 + 8 = 20

Next, count how many numbers are in the set. Here, there are four numbers: 2, 4, 6, and 8. To find the average, you divide the total sum by the number of values:

20 ÷ 4 = 5

The average of the numbers 2, 4, 6, and 8 is 5. This is why the correct answer is indeed 5.