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

    Question

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

    12           156        

    256         320         356         ?
    A 372 Correct Answer Incorrect Answer
    B 412 Correct Answer Incorrect Answer
    C 354 Correct Answer Incorrect Answer
    D 360 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    12 + 12² = 12 + 144 = 156 156 + 10² = 156 + 100 = 256 256 + 8² = 256 + 64 = 320 320 + 6² = 320 + 36 = 356 356 + 4² = 356 + 16 = 372

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