Question

    Which of the following is a Prime Number?

    A 12 Correct Answer Incorrect Answer
    B 7 Correct Answer Incorrect Answer
    C 9 Correct Answer Incorrect Answer
    D 4 Correct Answer Incorrect Answer

    Solution

    Any whole number greater than 1 that is divisible only by 1 and itself, is defined as a prime number. For example, 7 has only 2 factors, 1 and 7 itself. So, it is a prime number. However, 4 has three factors, 1, 2 and 4. Therefore, it is not a prime number. It is a composite number.

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