Which number is a prime number?

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Study for the Wonderlic Basic Skills Test (WBST) Exam. Utilize flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

Which number is a prime number?

Explanation:
A prime number is defined as a natural number greater than 1 that has no positive divisors other than 1 and itself. In this context, the number 11 fits the definition of a prime number perfectly because its only divisors are 1 and 11. The number 4 is divisible by 1, 2, and 4; thus, it is not prime. The number 9 can be divided by 1, 3, and 9, which means it is also not prime. Lastly, the number 15 is divisible by 1, 3, 5, and 15, indicating that it is not prime either. Therefore, the only number among the options provided that is a prime number is 11.

A prime number is defined as a natural number greater than 1 that has no positive divisors other than 1 and itself. In this context, the number 11 fits the definition of a prime number perfectly because its only divisors are 1 and 11.

The number 4 is divisible by 1, 2, and 4; thus, it is not prime. The number 9 can be divided by 1, 3, and 9, which means it is also not prime. Lastly, the number 15 is divisible by 1, 3, 5, and 15, indicating that it is not prime either. Therefore, the only number among the options provided that is a prime number is 11.

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