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    Question

    Find the sum of all the numbers between 1500 and 7200,

    which are divisible by 18, 24 and 30.
    A 64000 Correct Answer Incorrect Answer
    B 64800 Correct Answer Incorrect Answer
    C 55800 Correct Answer Incorrect Answer
    D 60800 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    LCM of 18, 24 and 30 = 360 So, desired numbers are: 1800, 2160, тАж, 6840 Number of terms = (6840 тАУ 1800)/360 + 1 = 15 Sum = (15/2) ├Ч [1800 + 6840] = 64800

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