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Question

What should come in place of the question mark (?) in the given series based on the English alphabetical order?
DKC ZGY ? RYQ NUM

This question was previously asked in
RRB NTPC 2024 CBT 1 Question Paper (28-Aug-2025) (Shift 3)
The correct answer is
VCU

Alphabetical Series Analysis

The series is DKC ZGY ? RYQ NUM. We analyze the pattern based on letter positions (A=1, ..., Z=26).

Pattern Identification

Let's analyze each position separately:

  1. First Letters: D(4), Z(26), ?(x), R(18), N(14)

    Sequence of operations determining the progression:

    • D(4) $\xrightarrow{+22}$ Z(26)
    • Z(26) $\xrightarrow{-4}$ V(22)
    • V(22) $\xrightarrow{-4}$ R(18)
    • R(18) $\xrightarrow{-4}$ N(14)

    The pattern observed is an initial jump (+22) followed by a consistent subtraction of 4. The missing first letter is V(22).

  2. Second Letters: K(11), G(7), ?(y), Y(25), U(21)

    The pattern involves a consistent subtraction of 4:

    • K(11) $\xrightarrow{-4}$ G(7)
    • G(7) $\xrightarrow{-4}$ C(3)
    • C(3) $\xrightarrow{-4}$ Y(25)
    • Y(25) $\xrightarrow{-4}$ U(21)

    The missing second letter is C(3).

  3. Third Letters: C(3), Y(25), ?(z), Q(17), M(13)

    The pattern involves a consistent subtraction of 4:

    • C(3) $\xrightarrow{-4}$ Y(25) (since $3 - 4 = -1 \equiv 25 \pmod{26}$)
    • Y(25) $\xrightarrow{-4}$ U(21)
    • U(21) $\xrightarrow{-4}$ Q(17)
    • Q(17) $\xrightarrow{-4}$ M(13)

    The missing third letter is U(21).

Result

Combining the deduced letters for the missing term (V, C, U), we get VCU.

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