What are numbers whose only factors are one and themselves?

What are numbers whose only factors are one and themselves?

• A. Composite numbers
• B. Prime numbers
• C. Natural numbers
• D. Even numbers

Answer: (B)

Prime numbers are numbers that have exactly two distinct positive divisors: 1 and the number itself. This means their only factors are 1 and themselves, and they must be greater than 1. That’s why this description points to primes. Composite numbers, on the other hand, have additional factors beyond 1 and the number itself. Natural numbers include primes, composites, and the number 1, so they’re broader than the specific property described. Even numbers are any numbers divisible by 2, which includes many composites (like 4 and 6) and just one even prime (2), so this category isn’t the precise match.

Prime numbers are numbers that have exactly two distinct positive divisors: 1 and the number itself. This means their only factors are 1 and themselves, and they must be greater than 1. That’s why this description points to primes. Composite numbers, on the other hand, have additional factors beyond 1 and the number itself. Natural numbers include primes, composites, and the number 1, so they’re broader than the specific property described. Even numbers are any numbers divisible by 2, which includes many composites (like 4 and 6) and just one even prime (2), so this category isn’t the precise match.