Coding Decoding: Unlocking the Pattern

This question is a classic example of a coding-decoding problem often found in logical reasoning sections. The goal is to identify the rule or pattern used to convert one word into a coded form and then apply that same rule to another word.

Analyzing the Given Code: HAMMER to ICPQJX

Let's look at the correspondence between the letters in the original word 'HAMMER' and its coded form 'ICPQJX'. We can examine the position of each letter in the English alphabet.

From the table, we can clearly see a pattern in the shift applied to each successive letter:

• The first letter (H) is shifted by $+1$ position to get I.
• The second letter (A) is shifted by $+2$ positions to get C.
• The third letter (M) is shifted by $+3$ positions to get P.
• The fourth letter (M) is shifted by $+4$ positions to get Q.
• The fifth letter (E) is shifted by $+5$ positions to get J.
• The sixth letter (R) is shifted by $+6$ positions to get X.

So, the rule is to shift the 1st letter by +1, 2nd by +2, 3rd by +3, 4th by +4, 5th by +5, and 6th by +6.

Applying the Pattern to WRENCH

Now, let's apply this same pattern to the word 'WRENCH'. The word 'WRENCH' also has six letters, just like 'HAMMER'. We will apply the corresponding shifts to each letter of 'WRENCH'.

Combining the coded letters, we get 'XTHRHN'.

Conclusion

Based on the coding pattern observed in 'HAMMER' becoming 'ICPQJX', the word 'WRENCH' is coded as 'XTHRHN'.

Let's check the given options:

• Option 1: XTHRHN
• Option 2: XTIRHN
• Option 3: XTHRIN
• Option 4: XTIRIN

Our calculated code 'XTHRHN' matches Option 1.

Revision Table: Coding Decoding Basics

Additional Information: Types of Coding Decoding

Coding-decoding problems can involve various patterns. Some common types include:

• Letter Shifting: Letters are shifted a fixed number of positions forward or backward (e.g., A becomes C, B becomes D, etc.).
• Sequential Shifting: The shift amount changes for each letter (+1, +2, +3... or -1, -2, -3... or alternating +1, -1, +2, -2, etc.).
• Reverse Order: The letters of the word are reversed and then potentially shifted.
• Alphabetical Position: Letters are replaced by their numerical position in the alphabet (A=1, B=2, etc.).
• Substitution: Specific letters are consistently replaced by other specific letters or symbols.
• Mixed Coding: A combination of letter and number or symbol coding.

Practicing different types helps in quickly identifying the pattern during exams.