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    Question

    Find the HCF of 84 and

    630.
    A 34 Correct Answer Incorrect Answer
    B 58 Correct Answer Incorrect Answer
    C 42 Correct Answer Incorrect Answer
    D None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Prime factors of 84 = 2 Ă— 2 Ă— 3 Ă— 7

    Prime factors of 630 = 2 Ă— 3 Ă— 3 Ă— 5 Ă— 7

    HCF = 2 Ă— 3 Ă— 7 = 42

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