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    Question

    251, 130, 274, ?, 301,

    76  What will come in the place of question (?) mark in following number series –
    A 125 Correct Answer Incorrect Answer
    B 110 Correct Answer Incorrect Answer
    C 100 Correct Answer Incorrect Answer
    D 105 Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    251, 130, 274, ?, 301, 76 251 - (11)2 = 130 130 + (12)2 = 274 274 - (13)2 = 105 105 + (14)2 = 301 301 - (15)2 = 76

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