Which term describes a number that ends with 0, 2, 4, 6, or 8?

Which term describes a number that ends with 0, 2, 4, 6, or 8?

• A. Odd number
• B. Natural number
• C. Prime number
• D. Even number

Answer: (D)

Even numbers are integers that can be divided by 2 with no remainder. In base-10, multiples of 2 end with 0, 2, 4, 6, or 8, so a number with one of those endings is an even number. For example, 28 ends with 8 and is divisible by 2, and 40 ends with 0 and is divisible by 2. The other terms don’t fit as naturally: odd numbers end with 1, 3, 5, 7, or 9; natural numbers are counting numbers and don’t depend on the last digit; prime numbers have exactly two divisors, and many even numbers aren’t prime (only 2 is the even prime). The ending digit test clearly identifies even numbers.

Even numbers are integers that can be divided by 2 with no remainder. In base-10, multiples of 2 end with 0, 2, 4, 6, or 8, so a number with one of those endings is an even number. For example, 28 ends with 8 and is divisible by 2, and 40 ends with 0 and is divisible by 2. The other terms don’t fit as naturally: odd numbers end with 1, 3, 5, 7, or 9; natural numbers are counting numbers and don’t depend on the last digit; prime numbers have exactly two divisors, and many even numbers aren’t prime (only 2 is the even prime). The ending digit test clearly identifies even numbers.