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    Question

    Ratio of two numbers 7:9 and their LCM is 1890. Find

    the sum of the given two numbers.
    A 450 Correct Answer Incorrect Answer
    B 470 Correct Answer Incorrect Answer
    C 480 Correct Answer Incorrect Answer
    D 500 Correct Answer Incorrect Answer

    Solution

    Let the two numbers be '7h' and '9h', where 'h' is the HCF of the two given numbers. Product of two numbers = (Product of LCM and HCF) of the given two numbers 7h Ă— 9h = h Ă— 1890 Or, 63h = 1890 So, 'h' = (1890 / 63) = 30 Therefore, the required sum = 7h + 9h = 16h = 16 Ă— 30 = 480 Hence, option c

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