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    5. x is a whole number. If the only common factors of x and x2 are 1 and x, then x is

    Question

    x is a whole number. If the only common factors

    of x and x2 are 1 and x, then x is
    A 1 Correct Answer Incorrect Answer
    B a perfect square Correct Answer Incorrect Answer
    C an odd number Correct Answer Incorrect Answer
    D a prime number Correct Answer Incorrect Answer

    Solution

    All the factors of x will also be the factors of x2 . If x and x2 have only 1 and x as their common factors, x has to be a prime number

    Practice Next
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