If DAY is written as EBZ, then how will NIGHT be written in the same code?

Appeared in: RML MAINS 2025

Explanation

The code follows a simple forward shift pattern where each letter in the original word is replaced by the next letter in the English alphabet.
In the example 'DAY' -> 'EBZ', 'D' becomes 'E' (+1), 'A' becomes 'B' (+1), and 'Y' becomes 'Z' (+1).
Applying this +1 shift to 'NIGHT' gives: N -> O, I -> J, G -> H, H -> I, T -> U, resulting in 'OJHIU'.

Option A: This option is incorrect because the first letter 'M' is a -1 shift from 'N' (N-1=M), which violates the established +1 forward shift pattern seen in the example DAY -> EBZ.
Option C: This option is incorrect as it uses an inconsistent and incorrect shift pattern for each letter (e.g., P is N+2, K is I+2, V is T+2), which does not match the simple +1 rule.
Option D: This option is incorrect because the last letter 'V' represents a +2 shift from 'T' (T+2=V). The established pattern requires a consistent +1 shift for all letters.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning: Letter Coding and Decoding as background academic context rather than a clinical decision trigger.
This type of logical reasoning question assesses problem-solving and pattern recognition skills, which are foundational for critical thinking in a clinical setting, such as identifying trends in vital signs or patient symptoms.
What if the code for DAY was 'CBZ'? This would represent a -1 shift for the first two letters (D-1=C, A-1=Z) and a +1 shift for the last (Y+1=Z). Applying this mixed pattern to 'NIGHT' would result in 'MHGIU'.

How to Approach the Question

First, analyze the relationship between the letters in the given example pair ('DAY' and 'EBZ').
Determine the specific pattern or rule by comparing each corresponding letter. Observe that each letter is shifted one position forward in the alphabet (D+1=E, A+1=B, Y+1=Z).
Once the '+1' rule is identified, apply this same rule consistently to each letter of the target word ('NIGHT').
Construct the new coded word by combining the shifted letters (N+1=O, I+1=J, G+1=H, H+1=I, T+1=U).
Compare your resulting word, 'OJHIU', with the given options to find the exact match.

Concept Tested & Keywords

QYcEhK8TMxFtTPV_GY0SqZ

Practise the full RML MAINS 2025

Attempt every question from this paper in a timed mock, then review the full solution for each one.