In a certain code language, '479' means "fruit is sweet", '248' means "very sweet voice" and '637' means "eat fruit daily". Which digit stands for "is" in that language?

1. A

   4

2. B

   7

3. C

   9

4. D

   8

Appeared in: RRB Staff Nurse Delhi-2015

Explanation

• The code for 'is' is found by identifying the codes for the other words in the phrase 'fruit is sweet' and finding the remaining digit.
• By comparing the first ('479' -> 'fruit is sweet') and second ('248' -> 'very sweet voice') statements, the common word 'sweet' corresponds to the common digit '4'.
• By comparing the first ('479' -> 'fruit is sweet') and third ('637' -> 'eat fruit daily') statements, the common word 'fruit' corresponds to the common digit '7'.
• In the first statement, since 'fruit' is '7' and 'sweet' is '4', the remaining word 'is' must correspond to the remaining digit '9'.

Why Other Options Were Wrong

• Option A: This digit represents the word 'sweet', as it is the common element between 'fruit is sweet' (479) and 'very sweet voice' (248).
• Option B: This digit represents the word 'fruit', as it is the common element between 'fruit is sweet' (479) and 'eat fruit daily' (637).
• Option D: This digit is part of 'very sweet voice' (248). After removing '4' for 'sweet', '8' could mean either 'very' or 'voice'. It does not mean 'is'.

Related Visual

• Visual 1: Flowchart - A flowchart illustrating the step-by-step process of elimination used to decode the word 'is'.
• Visual 2: Table - A summary table matching each identified digit to its corresponding word, highlighting the final answer.

Clinical Relevance

• Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Coding-Decoding Reasoning as background academic context rather than a clinical decision trigger.
• This type of logical reasoning question assesses problem-solving and analytical skills, which are crucial for nurses in clinical decision-making.
• Nurses must often synthesize information from multiple sources (like patient history, lab results, and vital signs) to identify the root cause of a problem, a process similar to decoding.
• What if? - If the first statement was '479' means 'fruit was sweet', the logic would remain identical. The process decodes words based on their presence or absence, not their grammatical tense or meaning.

How to Approach the Question

• Identify the question type: This is a coding-decoding problem where digits are assigned to words in a jumbled order.
• Scan all given statements to find common words and their corresponding common digits.
• Start by comparing two statements at a time. For example, compare 'fruit is sweet' (479) and 'very sweet voice' (248).
• Identify the common word ('sweet') and the common digit ('4'). This establishes that '4' means 'sweet'.
• Repeat this process with other pairs of statements to decode more words (e.g., comparing statement 1 and 3 reveals 'fruit' = '7').
• Use the process of elimination on the statement containing the target word ('is') to find its code. Since 'fruit' is 7 and 'sweet' is 4 in '479', the remaining 'is' must be '9'.

Concept Tested & Keywords

• Concept Tested: Coding-Decoding Reasoning
• Stem keywords: code language, 479, fruit is sweet, 248, very sweet voice, 637, eat fruit daily
• Lead-in keywords: Which digit stands for

Question ID

QJPEuq5oFgNHX0k3wy516Y

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