Graduate Management Admission Test (GMAT) Practice Test

When additional numbers are evenly divisible by 8 besides 8 itself, which of the following is true?

1. All are odd numbers

2. They include only prime numbers

3. They also include even numbers

4. They are all multiples of 3

The correct answer is: They also include even numbers

The statement that additional numbers are evenly divisible by 8 besides 8 itself must be analyzed in terms of the characteristics of such numbers. When we consider numbers divisible by 8, these numbers follow the form of \(8n\) where \(n\) is an integer. This means that numbers like 8, 16, 24, 32, and so on are included. Since these numbers are constructed as multiples of 8, they are all even due to the properties of evenness; any integer multiplied by an even integer results in an even integer. Therefore, it is correct to assert that these additional numbers, along with 8 itself, are indeed even. This underscores that the correct choice correctly identifies that the set of numbers divisible by 8, beyond just 8, contains even numbers. Other options do not hold true in this context: odd numbers cannot be evenly divisible by 8, prime numbers greater than 2 cannot be formed this way, and multiples of 3 are not inherently associated with numbers that are multiples of 8. Thus, the conclusion that they also include even numbers accurately reflects the properties of the multiples of 8.