Which number will come in place of the question mark to continue the following…

2016

Which number will come in place of the question mark to continue the following alphanumeric series? 2B9, 4E11, 12I15, ?

  1. A.

    36N23

  2. B.

    48M21

  3. C.

    60M21

  4. D.

    48N21

Attempted by 3 students.

Show answer & explanation

Correct answer: D

1. Break the alphanumeric series into three parallel series: First numbers, middle letters, and last numbers. 2. First numbers (2, 4, 12, ...): The pattern is x2, x3, x4. So, 12 x 4 = 48. 3. Middle letters (B, E, I, ...): Positions are 2, 5, 9. The pattern is +3, +4, +5. The next position is 9 + 5 = 14 (N). 4. Last numbers (9, 11, 15, ...): The pattern is +2, +4, +6. So, 15 + 6 = 21. Combining these gives 48N21. Final Answer: Option D

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