New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

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

    20      21       30       55      104   

      ?
    A 185 Correct Answer Incorrect Answer
    B 186 Correct Answer Incorrect Answer
    C 183 Correct Answer Incorrect Answer
    D 184 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    20 + 12 = 21 21 + 32 = 30 30 + 52 = 55 55 + 72 = 104 104 + 92 =  185

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