In a certain code language, 'LEAP' is coded as '3197' and 'CLAP' is coded as '7513'. What is the code for 'C' in the code language?

Appeared in: DSSSB October 2024

Explanation

The question uses a substitution cipher where each letter corresponds to a unique digit.
By comparing 'LEAP' (3197) and 'CLAP' (7513), we can identify common and unique elements.
The letters L, A, and P are common to both words, and the digits 1, 3, and 7 are common to both codes.
The unique letter in 'CLAP' is 'C', and the unique digit in its code '7513' is '5'.
Therefore, the code for 'C' must be 5.

Option B: The digit '1' is present in the codes for both 'LEAP' and 'CLAP'. This means it corresponds to one of the common letters (L, A, or P), not the unique letter 'C'.
Option C: The digit '3' is common to the codes for both 'LEAP' and 'CLAP'. It represents one of the shared letters (L, A, or P).
Option D: The digit '7' is also a common digit in both codes, corresponding to one of the common letters (L, A, or P).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Coding-Decoding by Substitution as background academic context rather than a clinical decision trigger.
This is a logical reasoning question, not a clinical one. It tests analytical and problem-solving skills, which are essential for nurses in making quick, logical decisions during patient care.
What if the words were 'LEAP' = 3197 and 'PEAR' = 7219? In this case, the common letters are P, E, A. The common numbers are 7, 1, 9. The unique letter in 'LEAP' is L, and the unique number is 3. So, L=3. The unique letter in 'PEAR' is R, and the unique number is 2. So, R=2.

How to Approach the Question

First, carefully write down the given words and their corresponding codes.
Identify the letters that are common to all the given words.
Similarly, identify the numbers that are common to all the given codes.
Match the unique letter in a word to the unique number in its code to find its value.
This process of elimination will reveal the code for the letter asked in the question.

Concept Tested & Keywords

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Practise the full DSSSB October 2024

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