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    Question

    Three numbers are in the ratio 7:5:4 respectively. If

    the HCF of the numbers is 3, then find the LCM of the numbers.
    A 360 Correct Answer Incorrect Answer
    B 420 Correct Answer Incorrect Answer
    C 252 Correct Answer Incorrect Answer
    D 300 Correct Answer Incorrect Answer

    Solution

    Numbers:
    7 × 3 = 21
    5 × 3 = 15
    4 × 3 = 12
    LCM of 21, 15, and 12 = 420

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