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    4. HCF and LCM
    5. The sum of two numbers is 143, and their difference is 13. What is the L.C.M of these two numbers?

    Question

    The sum of two numbers is 143, and their difference is

    13. What is the L.C.M of these two numbers?
    A 374 Correct Answer Incorrect Answer
    B 446 Correct Answer Incorrect Answer
    C 420 Correct Answer Incorrect Answer
    D 390 Correct Answer Incorrect Answer

    Solution

    Let the two numbers be ‘a’ and ‘b’ where a > b.
    So, a = b + 13
    We have a + b = b + 13 + b = 143
    So, b = (143 – 13) ÷ 2 = 65
    L.C.M of 65 and 78 = 390

    Practice Next
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