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    Question

    The product of two positive numbers is 3920. If one

    number is five times the other, then the sum of the two numbers is:
    A 100 Correct Answer Incorrect Answer
    B 120 Correct Answer Incorrect Answer
    C 168 Correct Answer Incorrect Answer
    D 130 Correct Answer Incorrect Answer

    Solution

    Let one of the positive numbers be x.  The other will be 5x Now,  5x × x = 3920 x2 = 3920 ÷ 5 = 784 Therefore, x = √784 = 28 Sum of the two numbers = 140 + 28 = 168

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