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    Question

    The LCM of two numbers is 40 times its HCF. If the

    product of the numbers is 1440, find their HCF.
    A 6 Correct Answer Incorrect Answer
    B 12 Correct Answer Incorrect Answer
    C 15 Correct Answer Incorrect Answer
    D 8 Correct Answer Incorrect Answer

    Solution

    LCM = 40 x HCF formula used LCM x HCF = Product of no.'s let HCF be a LCM = 40a Now, 40a x a = 1440 40a2 = 1440 a2 = 36 a = 6

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