Understanding Coding Decoding Problems

This question is an example of a coding-decoding problem where words are coded based on a specific pattern or rule. To solve such problems, we need to analyze the given examples to identify the underlying rule and then apply that rule to the word we need to code.

In this case, we are given:

• GAME is coded as TUZANOVW
• CAR is coded as XYZAIJ

We need to find out how POST will be written in the same language.

Analyzing the Coding Pattern

Let's look at the length of the words and their codes:

• GAME has 4 letters, and its code TUZANOVW has 8 letters.
• CAR has 3 letters, and its code XYZAIJ has 6 letters.

This pattern suggests that each letter in the original word is coded into two letters in the coded word.

Decoding the Rule for Each Letter

Let's break down the coding for each letter based on the given examples:

From GAME → TUZANOVW:

• G is coded as TU
• A is coded as ZA
• M is coded as NO
• E is coded as VW

From CAR → XYZAIJ:

• C is coded as XY
• A is coded as ZA
• R is coded as IJ

Notice that the letter 'A' is consistently coded as 'ZA' in both examples. Let's analyze the other letters and their corresponding two-letter codes. A common pattern in coding-decoding is the use of the reverse alphabet. The reverse alphabet pairs letters based on their position from the start and end (A is 1st, Z is 26th; B is 2nd, Y is 25th, etc. The sum of positions is always 27). For example, the reverse of A is Z, reverse of B is Y, reverse of C is X, reverse of G is T, reverse of M is N, reverse of R is I, reverse of E is V.

Let's examine the codes in relation to the original letters and their reverse letters:

• G: Reverse of G is T. The code for G is TU. The first letter 'T' is the reverse of G. The second letter 'U' is the letter immediately following 'T' in the alphabet.
• A: Reverse of A is Z. The code for A is ZA. The first letter 'Z' is the reverse of A. The second letter 'A' is the original letter itself.
• M: Reverse of M is N. The code for M is NO. The first letter 'N' is the reverse of M. The second letter 'O' is the letter immediately following 'N'.
• E: Reverse of E is V. The code for E is VW. The first letter 'V' is the reverse of E. The second letter 'W' is the letter immediately following 'V'.
• C: Reverse of C is X. The code for C is XY. The first letter 'X' is the reverse of C. The second letter 'Y' is the letter immediately following 'X'.
• R: Reverse of R is I. The code for R is IJ. The first letter 'I' is the reverse of R. The second letter 'J' is the letter immediately following 'I'.

Establishing the Coding Rule

Based on this analysis, we can establish the coding rule:

• If the letter is 'A', it is coded as (Reverse of the letter) + (Original letter).
• For all other letters observed (C, E, G, M, R), it is coded as (Reverse of the letter) + (Letter immediately following the Reverse of the letter).

Let's summarize the letter-to-code mapping we've found:

Applying the Rule to POST

Now, let's apply this rule to the word POST:

• P: P is not 'A'. Its reverse letter is K. The letter immediately following K is L. So, P is coded as KL.
• O: O is not 'A'. Its reverse letter is L. The letter immediately following L is M. So, O is coded as LM.
• S: S is not 'A'. Its reverse letter is H. The letter immediately following H is I. So, S is coded as HI.
• T: T is not 'A'. Its reverse letter is G. The letter immediately following G is H. So, T is coded as GH.

Combining the codes for each letter, POST is coded as KL + LM + HI + GH, which is KLLMHIGH.

Verifying the Answer

Let's check the options provided:

1. OQNPRTSV
2. QRPQTUUV
3. KLLMHIGH
4. KLMNJKGH

Our calculated code for POST is KLLMHIGH, which matches Option 3.

Conclusion

Based on the analysis of the given coded words and the derived rule, the word POST is coded as KLLMHIGH in that language.

Coding Decoding Revision Table

Here is a quick recap of the coding applied:

Additional Information on Coding Decoding

Coding-decoding is a common topic in logical reasoning sections of competitive exams. Problems can involve various types of coding:

• Letter Coding: Letters are replaced by other letters based on a specific rule (like shifting positions, reverse alphabet, skipping letters). This question is an example of letter coding.
• Number Coding: Words are coded into numbers based on letter positions, counts, or other numerical rules.
• Symbol Coding: Letters or words are replaced by symbols.
• Mixed Coding: A combination of letters, numbers, and symbols, often presented as sentences coded into other sentences to find specific word codes.

Understanding the alphabet's forward and backward sequence and common patterns like reverse letters (A-Z, B-Y, C-X, etc.) is crucial for solving letter coding problems efficiently.