Which of the following is an example of an even number?

• A. 3
• B. 5
• C. 10
• D. 15

Answer: (C)

An even number is defined as an integer that is exactly divisible by 2, meaning there is no remainder when divided by 2. For example, if you take the number 10 and divide it by 2, it yields 5 with no remainder, indicating that 10 is an even number.

In contrast, the other numbers listed—3, 5, and 15—when divided by 2 result in a remainder of 1, which categorizes them as odd numbers. This distinction between odd and even is fundamental in understanding number properties, especially in early mathematics education, where students learn to recognize patterns, classify numbers, and understand operations related to them.