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    Question

    The LCM of two numbers is 840 and their HCF is 14. If

    one of the numbers is 84, find the other number.
    A 175 Correct Answer Incorrect Answer
    B 125 Correct Answer Incorrect Answer
    C 140 Correct Answer Incorrect Answer
    D 165 Correct Answer Incorrect Answer

    Solution

    For any two numbers a and b: a × b = LCM × HCF Given: a = 84, LCM = 840, HCF = 14 So b = (LCM × HCF) / a = (840 × 14) / 84 = 14 × 10 = 140

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