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Question

Select the letter that can replace the question mark (?) in the following series.

D, V, F, T, H, R, J, ?

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
P

Series Pattern Analysis

The question presents a series of letters: D, V, F, T, H, R, J, ?. To find the missing letter, we need to identify the pattern governing the sequence. Observe that the series can be split into two distinct alternating sub-series:

  • Sub-series 1 (Odd positions): D, F, H, J, ...
  • Sub-series 2 (Even positions): V, T, R, ? , ...

Sub-series 1 Progression

Let's examine the first sub-series (letters at positions 1, 3, 5, 7): D, F, H, J. We look at their positions in the alphabet:

  • D is the 4th letter.
  • F is the 6th letter.
  • H is the 8th letter.
  • J is the 10th letter.

The pattern here is an addition of 2 to the alphabetical position (4, 6, 8, 10). The next letter in this sub-series would be the 12th letter (L).

Sub-series 2 Progression

Now, let's examine the second sub-series (letters at positions 2, 4, 6, 8): V, T, R, ?. We look at their positions in the alphabet:

  • V is the 22nd letter.
  • T is the 20th letter.
  • R is the 18th letter.

The pattern here is a subtraction of 2 from the alphabetical position (22, 20, 18). Following this pattern, the next letter in this sub-series is calculated as:

Position of R = 18
Next position = 18 - 2 = 16

The 16th letter of the alphabet is P.

Conclusion

Since the question mark is at the 8th position (an even position), it belongs to the second sub-series. Therefore, the letter that replaces the question mark is P.

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