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    Question

    Find the wrong number in the given number series.

    12, 21, 5, 38, 2, 71
    A 2 Correct Answer Incorrect Answer
    B 38 Correct Answer Incorrect Answer
    C 12 Correct Answer Incorrect Answer
    D 21 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    12 + (3)² = 21

    21 - (4)² = 5

    5 + (5)² = 30

    30 - (6)² = -6

    -6 + (7)² = 43

    So, 30 should be in place of 38.

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