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Question

What should come in place of the question mark (?) in the given series based on the English alphabetical order?
XJI PBA HTS ZLK ?

This question was previously asked in
RRB ALP 2025 CBT 2 Wiremen Question Paper (28-Jul-2026) (Shift 2)
The correct answer is
RDC

Alphabetical Series Pattern Analysis

The question asks to find the next term in the alphabetical series: XJI PBA HTS ZLK ?

We will analyze the pattern by considering the positions of the letters in the English alphabet (A=1, B=2, ..., Z=26).

Analyzing Letter Positions

Represent each term using the numerical positions of its constituent letters:

  • Term 1: XJI = (24, 10, 9)
  • Term 2: PBA = (16, 2, 1)
  • Term 3: HTS = (8, 20, 19)
  • Term 4: ZLK = (26, 12, 11)

Identifying the Pattern

Examine the sequence of positions for each letter place:

  • First Letter Sequence: 24, 16, 8, 26. The difference between consecutive terms is -8.
    • \(24 - 8 = 16\)
    • \(16 - 8 = 8\)
    • \(8 - 8 = 0\). In alphabetical order, 0 corresponds to Z (26).
  • Second Letter Sequence: 10, 2, 20, 12. The difference is consistently -8 (applying wrap-around where necessary).
    • \(10 - 8 = 2\)
    • \(2 - 8 = -6\). Adding 26 gives 20 (\( -6 + 26 = 20\)).
    • \(20 - 8 = 12\)
  • Third Letter Sequence: 9, 1, 19, 11. The difference is consistently -8.
    • \(9 - 8 = 1\)
    • \(1 - 8 = -7\). Adding 26 gives 19 (\( -7 + 26 = 19\)).
    • \(19 - 8 = 11\)

The established pattern for each letter position is to subtract 8 from the previous term's corresponding letter position.

Calculating the Next Term

Apply the identified pattern (-8) to the last term (ZLK) to find the missing term:

  • First Letter: Z is the 26th letter. \(26 - 8 = 18\). The 18th letter is R.
  • Second Letter: L is the 12th letter. \(12 - 8 = 4\). The 4th letter is D.
  • Third Letter: K is the 11th letter. \(11 - 8 = 3\). The 3rd letter is C.

Conclusion

Combining the calculated letters, the next term in the series is RDC.

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Similar Questions

  1. In the following series, one term is missing as shown by the question mark(?). Select the missing term from the given options.
    A, BC, DEF, GHIJ, ?

  2. A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

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Important Questions from Alphabet Series

  1. A series is given with some letters missing. Choose the correct alternative from the given ones that will complete the series:

    BR __ __ NB __ O __ NB
  2. A series is given with some letters missing. Choose the set of letters which when sequentially placed shall complete it .

    a __ __ dba __ __ bcad __ __ da __ __ cd
  3. In the following letter series, some of the letters are missing which are given in that order as one of the alternatives below It. Choose the correct alternative

    _ a _ b _ abaa _ bab _ abb
  4. Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series.

    Q _ P _ M _ A _ T _ Q A _ T M

  5. In the series _b_a_ba_b_abab_aab;

    fill in the six blanks ( _ ) using one of the following given four choices such that the series follows a specific order.

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