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Difficulty: MediumCoding and Decoding

A metropolitan transport network assigns an identification string to each station name using a consistent alphabetic transformation logic. Under this system, the station named NORTH is encoded as OQUXM, and the station named SOUTH is encoded as TQXXM.

What will be the encoded identification string for the station named CENTRAL?

Answer: DGQXWGS / dgqxwgs

Answer

DGQXWGS
The coding logic applies an increasing forward shift to the English alphabet based on the letter's position in the word (1st letter +1, 2nd letter +2, 3rd letter +3, etc.). Applying this sequence to CENTRAL (C+1, E+2, N+3, T+4, R+5, A+6, L+7) yields DGQXWGS.

Step-by-Step Solution

1
Analyze the transformation pattern from the first example, NORTH to OQUXM.
N(+1) = O; O(+2) = Q; R(+3) = U; T(+4) = X; H(+5) = M.
To identify the underlying coding rule, which involves an increasing positional shift.
2
Verify the identified pattern using the second example, SOUTH to TQXXM.
S(+1) = T; O(+2) = Q; U(+3) = X; T(+4) = X; H(+5) = M.
To confirm that the logic applies consistently across different inputs.
3
Calculate the shifted letters for the target word CENTRAL by applying the verified pattern.
C(+1)=D, E(+2)=G, N(+3)=Q, T(+4)=X, R(+5)=W, A(+6)=G, L(+7)=S.
To determine the final encoded string according to the established algorithm.

Key Concept

Positional Alphabet Shifting
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Topics

Coding and Decoding

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