The sequence '2, 4, 6, 8' consists of the first four positive even numbers. Each number is obtained by adding 2 to the previous number, showcasing a simple arithmetic progression. These numbers are fundamental in mathematics and are often used in various calculations and problem-solving scenarios. Even numbers, such as 2, 4, 6, and 8, are integers that can be divided by 2 without leaving a remainder. They play a crucial role in number theory and are essential in understanding concepts like parity and divisibility. This sequence is not only significant in mathematics but also appears in everyday contexts, such as counting and grouping.