Coding and Decoding: Understanding Letter Transformations

This question involves a coding-decoding exercise where a word is transformed into a code based on a specific rule or pattern. We are given the transformation for the word 'SCREEN' into 'LCCPAQ' and need to apply the same logic to find the code for 'SKILLS'.

Analysing the Coding Pattern for SCREEN to LCCPAQ

Let's look at the letters in the original word 'SCREEN' and the corresponding letters in the coded word 'LCCPAQ'. There are 6 letters in both words, suggesting a direct letter-to-letter transformation, possibly with a shift or rearrangement.

Let's consider the alphabetical position of each letter (A=1, B=2, ..., Z=26):

Comparing the positions directly doesn't reveal an obvious simple shift pattern applied consistently to each letter in order. Let's try looking at the letters in reverse order of the coded word and compare them with the original word letters in forward order.

We can observe a consistent pattern here: Each letter in the original word 'SCREEN' is shifted backward by 2 positions in the alphabet to obtain the letters of the coded word 'LCCPAQ' when read in reverse order.

• S (19) - 2 = Q (17)
• C (3) - 2 = A (1)
• R (18) - 2 = P (16)
• E (5) - 2 = C (3)
• E (5) - 2 = C (3)
• N (14) - 2 = L (12)

The resulting sequence of letters after the -2 shift is Q, A, P, C, C, L. When this sequence is reversed, we get L, C, C, P, A, Q, which is the given code for 'SCREEN'.

Applying the Pattern to SKILLS

Now, let's apply the same rule to the word 'SKILLS'. The rule is: apply a -2 shift to each letter and then reverse the resulting sequence to get the code.

The sequence of letters obtained after applying the -2 shift to 'SKILLS' is Q, I, G, J, J, Q.

Now, we need to reverse this sequence to get the final code:

Q, I, G, J, J, Q reversed is Q, J, J, G, I, Q.

Comparing with Options

Let's compare our derived code 'QJJGIQ' with the given options:

1. QJJHIR
2. QJJJGQ
3. OJJGQ
4. QJJGIQ

Our derived code 'QJJGIQ' matches option 4.

Therefore, the code for 'SKILLS' in this language is 'QJJGIQ'.

Revision Table: Coding Rule Summary

Additional Information: Types of Letter Coding

Coding-decoding problems often involve different patterns. Understanding these patterns helps in solving such questions. Common types include:

• Letter Shift: Each letter is shifted forward or backward by a fixed number of positions (like in this problem, but combined with reversal). The shift can be uniform for all letters or vary based on the letter's position or value.
• Direct Letter Replacement: Each letter in the original word is replaced by a specific letter, which might be fixed or determined by a rule.
• Position Change/Rearrangement: The letters of the word are rearranged in a specific order (e.g., reversing the word, shuffling letters based on position).
• Opposite Letters: Letters are replaced by their corresponding letters from the other end of the alphabet (A=Z, B=Y, etc.).
• Combination of Rules: A combination of the above methods might be used, such as a shift followed by rearrangement.

Practicing different types helps in quickly identifying the pattern in coding decoding questions.