Question

    What should come in place of question mark (?) in the following number series?

    12 13 21 44

    112.5?
    A 340.5 Correct Answer Incorrect Answer
    B 412.5 Correct Answer Incorrect Answer
    C 529.6 Correct Answer Incorrect Answer
    D 89.5 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    12 × 1 + 1 = 13 13 × 1.5 + 1.5 = 21 21 × 2 + 2 = 44 44 × 2.5 + 2.5 = 112.5 112.5 × 3 + 3 = 340.5

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