Understanding Coding-Decoding Patterns

In coding-decoding questions, we need to identify the pattern or rule used to transform one word into another. This pattern is then applied to a new word to find its coded form. The given example is:

• Original Word: CHHAPAK
• Coded Word: DJKEUGR

Let's analyze the transformation for each letter:

• C to D: D is 1 letter after C in the alphabet (+1)
• H to J: J is 2 letters after H in the alphabet (+2)
• H to K: K is 3 letters after H in the alphabet (+3)
• A to E: E is 4 letters after A in the alphabet (+4)
• P to U: U is 5 letters after P in the alphabet (+5)
• A to G: G is 6 letters after A in the alphabet (+6)
• K to R: R is 7 letters after K in the alphabet (+7)

The pattern observed is that each letter in the original word is shifted forward in the alphabet by an increasing number, starting from +1 for the first letter, +2 for the second, and so on, up to +7 for the seventh letter. The shift applied to the n^th letter is $+n$.

Applying the Coding Rule to MALANGA

Now, we apply this pattern to the word MALANGA. The word MALANGA has 7 letters.

Combining the coded letters, we get N C O E S M H.

Verifying the Coded Word

The coded word for MALANGA is NCOESMH. We compare this with the given options:

• Option 1: NCEOSMC
• Option 2: NCOCMSC
• Option 3: NCOCSMC
• Option 4: NCOESMH

The calculated coded word NCOESMH matches Option 4.

Revision Table: Letter Shifts

Additional Information on Coding-Decoding

Coding-decoding is a common topic in competitive exams. These questions test your ability to identify patterns in how words or numbers are transformed. Common types of patterns include:

• Letter Shifting: Each letter is shifted forward or backward by a fixed number of positions (e.g., +1, +2, -3).
• Letter Shifting with Increasing/Decreasing Steps: The shift amount changes for each letter, as seen in this question (+1, +2, +3...).
• Reverse Lettering: The letters of the word are reversed.
• Opposite Lettering: Each letter is replaced by its corresponding letter from the other end of the alphabet (A becomes Z, B becomes Y, etc.).
• Mixed Patterns: Combinations of the above, or other logical rules based on position, vowels/consonants, etc.

To solve these questions effectively, it's helpful to know the alphabetical order and the position number of each letter (A=1, B=2, ..., Z=26).