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    Question

    The sum of first 'n' natural numbers is 465. Find

    'n'.
    A 30 Correct Answer Incorrect Answer
    B 25 Correct Answer Incorrect Answer
    C 42 Correct Answer Incorrect Answer
    D 55 Correct Answer Incorrect Answer

    Solution

    ATQ, Sum of first n natural numbers = n(n+1)/2 n(n+1)/2 = 465 n(n+1) = 930 30*31 = 930 So n = 30

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