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    Question

    The following numbers form a series. Find the odd one out. 

    21, 44, 78, 121, 179,

    246
    A 246 Correct Answer Incorrect Answer
    B 179 Correct Answer Incorrect Answer
    C 21 Correct Answer Incorrect Answer
    D 121 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, 21 + 23 = 44 44 + 34 = 78 78 + 45 = 123 123 + 56 = 179 179 + 67 = 246 Therefore, 123 should be in place of 121.

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