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    Question

    Which of the following is a prime

    number?
    A 399 Correct Answer Incorrect Answer
    B 621 Correct Answer Incorrect Answer
    C 363 Correct Answer Incorrect Answer
    D 461 Correct Answer Incorrect Answer

    Solution

    399 = 21  19 So it is not a prime number. 621 = 23 27 So it is not a prime number. 363 = 33  11 So it is not a prime number. 461 is a prime number because it is not divisible by any number except 1 & itself. 481 = 37  13 So it is not a prime number.

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