New RBI Grade B 2025 Notification will come Soon! Enroll Here

    Question

    What is the missing number in the series:

    2,7,28,63,126,____
    A 215 Correct Answer Incorrect Answer
    B 245 Correct Answer Incorrect Answer
    C 276 Correct Answer Incorrect Answer
    D 296 Correct Answer Incorrect Answer

    Solution

    The pattern is ( n^3 + n ) (e.g., ( 1^3+1=2 ), ( 2^3-1=7 ), ( 3^3+1=28 ), etc.), so ( 6^3-1=215 ). 

    Practice Next