Question

    Find out the wrong number in the following given series:

    7 13 15 29 31 57

    A 13 Correct Answer Incorrect Answer
    B 15 Correct Answer Incorrect Answer
    C 57 Correct Answer Incorrect Answer
    D 7 Correct Answer Incorrect Answer
    E 29 Correct Answer Incorrect Answer

    Solution

    7 × 2 – 1 = 13 13 × 1 + 2 = 15 15 × 2 – 3 = 27 27 × 1 + 4 = 31 31 × 2 – 5 = 57

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