In a certain code 'BOMBAY' is coded as "CPNYAB"; 'STUPID' is coded as "TUVDIP"; then what will be the code for 'VELVET'?

Appeared in: AIIMS Manglagiri NO - 2019

Explanation

The question follows a two-part coding rule based on splitting the word into two halves.
For the first half of the word, each letter is replaced by the next letter in the alphabetical sequence (a +1 shift).
For the second half of the word, the sequence of letters is simply reversed.
Applying this to 'VELVET', the first half 'VEL' becomes 'WFM' (V+1=W, E+1=F, L+1=M).
The second half 'VET', when reversed, becomes 'TEV'.
Combining these two parts results in the final code 'WFMTEV'.

Option B: This option, 'WVMETF', incorrectly processes both halves of the word. It seems to follow a different, inconsistent pattern.
Option C: This option, 'TEVWFM', correctly derives the two parts ('WFM' and 'TEV') but reverses their final order. The pattern from the examples shows the processed first half comes first.
Option D: This option, 'WFMVET', correctly processes the first half ('VEL' -> 'WFM') but fails to apply the reversal rule to the second half, leaving 'VET' unchanged.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Logical Reasoning: Coding-Decoding as background academic context rather than a clinical decision trigger.
While not a clinical question, aptitude and reasoning skills are a component of many nursing entrance and recruitment exams to assess problem-solving and critical thinking abilities.
These questions evaluate a candidate's ability to identify patterns and apply logical rules, a skill that is transferable to making logical deductions in clinical diagnostics and care planning.
What if the word had an odd number of letters? The rule would need clarification. For a 7-letter word like 'CHENNAI', a common variation is to split it as 'CHE' / 'N' / 'NAI', where the middle letter might be coded separately or left as is.

How to Approach the Question

First, carefully examine the given examples ('BOMBAY' -> 'CPNYAB', 'STUPID' -> 'TUVDIP') to find the relationship between the original word and its code.
Notice that all words have an even number of letters (6), suggesting a split into two equal 3-letter halves is a likely starting point.
Analyze the first half ('BOM' -> 'CPN'). Check for common patterns like letter shifting. Here, it's a simple +1 shift for each letter (B->C, O->P, M->N).
Analyze the second half ('BAY' -> 'YAB'). This is a clear reversal of the letter order.
Confirm this two-part pattern with the second example: 'STU' -> 'TUV' is a +1 shift, and 'PID' -> 'DIP' is a reversal. The rule is consistent.
Apply the confirmed rule to the question word 'VELVET'. Split it into 'VEL' and 'VET', process each half according to its rule, and combine the results to find the answer.

Concept Tested & Keywords

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Practise the full AIIMS Manglagiri NO - 2019

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