When is a number considered divisible by 2?

A number is considered divisible by 2 when its last digit is even. This includes the digits 0, 2, 4, 6, and 8. The fundamental principle here is based on the formation of numbers in our base-10 system where the last digit determines a number's divisibility by 2. If the last digit is one of those even numbers, it indicates that the entire number can be evenly split into two equal parts, which is the definition of divisibility.

For instance, the number 24 ends in 4, which is even, and thus 24 is divisible by 2 (24 ÷ 2 = 12). Conversely, if the last digit were odd (like 1, 3, 5, 7, or 9), the number would not be divisible by 2, indicating that the answer is specifically focused on even digits.