Question

    What will come in place of the question mark (?) in the

    following series? 1, 2, 5, 16, 65, ?
    A 210 Correct Answer Incorrect Answer
    B 326 Correct Answer Incorrect Answer
    C 418 Correct Answer Incorrect Answer
    D 341 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ,

    Observe:

    1 × 1 + 1 = 2

    2 × 2 + 1 = 5

    5 × 3 + 1 = 16

    16 × 4 + 1 = 65

    65 × 5 + 1 = 326

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