This question is a classic example of a coding-decoding problem where words are assigned numerical codes based on a specific pattern. To solve this, we need to compare the given phrases and their corresponding codes to identify the code for each individual word.

Decoding the Code Language Step-by-Step

Let's break down the given information and find the code for each word by comparing the phrases:

1. 'I like chocolates' is coded as '958'.
2. 'we bought chocolates' is coded as '153'.
3. 'we like them' is coded as '816'.

Comparing Phrases to Find Word Codes

We can find the code for common words by looking for common digits in the codes of phrases that share a word.

• Comparing Phrase 1 and Phrase 2:
  • Common word: 'chocolates'
  • Common code digit: '5'
  • Therefore, the code for 'chocolates' is '5'.
• Comparing Phrase 1 and Phrase 3:
  • Common word: 'like'
  • Common code digit: '8'
  • Therefore, the code for 'like' is '8'.
• Using Code from Phrase 1:
  • Phrase 1: 'I like chocolates' = '958'
  • We know 'like' = '8' and 'chocolates' = '5'.
  • The remaining word is 'I' and the remaining code digit is '9'.
  • Therefore, the code for 'I' is '9'.
• Comparing Phrase 2 and Phrase 3:
  • Common word: 'we'
  • Common code digit: '1'
  • Therefore, the code for 'we' is '1'.
• Using Code from Phrase 2:
  • Phrase 2: 'we bought chocolates' = '153'
  • We know 'we' = '1' and 'chocolates' = '5'.
  • The remaining word is 'bought' and the remaining code digit is '3'.
  • Therefore, the code for 'bought' is '3'.
• Using Code from Phrase 3:
  • Phrase 3: 'we like them' = '816'
  • We know 'we' = '1' and 'like' = '8'.
  • The remaining word is 'them' and the remaining code digit is '6'.
  • Therefore, the code for 'them' is '6'.

Summary of Word Codes

Let's list the codes we have found for each word:

Finding the Code for 'I bought them'

Now we need to find the code for the phrase 'I bought them'. We can use the codes we have already determined for each word:

• Code for 'I' is '9'.
• Code for 'bought' is '3'.
• Code for 'them' is '6'.

Combining these codes, the code for 'I bought them' would be '9', '3', and '6'. The order of the digits in the final code doesn't always match the word order unless specified. So, we look for the combination of these digits in the options.

The code for 'I bought them' is '936'.

Conclusion on Coding Decoding

By systematically comparing the given coded phrases, we were able to determine the code for each word. Using these individual word codes, we found the code for the required phrase 'I bought them'. The code is 936.

Revision Table: Key Code Mappings

Additional Information: Coding Decoding Techniques

Coding-decoding questions are common in logical reasoning sections of competitive exams. They test your ability to identify patterns and rules in coded messages. Common types include:

• Letter Coding: Letters are replaced by other letters based on a pattern (e.g., shifting positions in the alphabet).
• Number Coding: Words or letters are replaced by numbers. This can be based on alphabetical position, digit sum, or patterns as seen in this question.
• Symbol Coding: Letters or words are replaced by symbols.
• Mixed Coding: A combination of letters, numbers, and symbols might be used.

Solving these requires careful observation and comparison of the given coded examples to decipher the underlying rule or mapping.