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    Question

    The HCF and LCM of two natural numbers are 10 and 60,

    respectively. What is the difference between the two numbers, if one of the numbers is 30?
    A 10 Correct Answer Incorrect Answer
    B 15 Correct Answer Incorrect Answer
    C 20 Correct Answer Incorrect Answer
    D 30 Correct Answer Incorrect Answer

    Solution

    Given:
    - HCF = 10
    - LCM = 60
    - First number = 30
    Using the formula:
    HCF × LCM = First number × Second number
    10 × 60 = 30 × Second number
    600 = 30 × Second number
    Second number = 600 / 30 = 20
    Difference between two numbers: 30 - 20 = 10

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