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    Question

    In each of the following number series, one term is

    wrong. Find the wrong term. 3, 7, 13, 21, 31, 42, 57
    A 42 Correct Answer Incorrect Answer
    B 21 Correct Answer Incorrect Answer
    C 57 Correct Answer Incorrect Answer
    D 31 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, Pattern is + even numbers in sequence 3 + 4 = 7 7 + 6 = 13 13 + 8 = 21 21 + 10 = 31 31 + 12 = 43 43 + 14 = 57 So the correct series should be: 3, 7, 13, 21, 31, 43, 57 Hence, 42 is the wrong term.

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