Solving Letter Series Analogy Questions

This question asks us to find a relationship between pairs of letter strings based on their positions in the English alphabetical order. We are given two examples of this relationship:

• SFBV is related to HUYE
• JQEF is related to QJVU

We need to find the same relationship and apply it to CKSW to find the corresponding letter string from the given options.

Understanding the Relationship: Alphabetical Reverse Pairs

Let's examine the relationship between the letters in the first pair, SFBV and HUYE. We can look at the positions of these letters in the standard English alphabet (A=1, B=2, ..., Z=26).

Sometimes, letter series relationships involve 'reverse pairs'. Two letters are reverse pairs if their positions from the start and end of the alphabet are swapped. For example, A is the 1st letter from the start, and Z is the 1st letter from the end. A and Z are reverse pairs. Similarly, B is the 2nd from the start, Y is the 2nd from the end. B and Y are reverse pairs.

We can also define reverse pairs as two letters whose positions from the start of the alphabet sum up to 27. For example, A (1) + Z (26) = 27, B (2) + Y (25) = 27, and so on.

Let's list some common alphabetical reverse pairs:

Analyzing the Given Letter Relationships

Let's check if the relationship between SFBV and HUYE is based on reverse pairs for each corresponding letter:

• First letter: S is the reverse pair of H (S <-> H)
• Second letter: F is the reverse pair of U (F <-> U)
• Third letter: B is the reverse pair of Y (B <-> Y)
• Fourth letter: V is the reverse pair of E (V <-> E)

So, SFBV is related to HUYE by replacing each letter with its alphabetical reverse pair.

Let's check the second pair, JQEF and QJVU, using the same logic:

• First letter: J is the reverse pair of Q (J <-> Q)
• Second letter: Q is the reverse pair of J (Q <-> J)
• Third letter: E is the reverse pair of V (E <-> V)
• Fourth letter: F is the reverse pair of U (F <-> U)

JQEF related to QJVU also follows the same rule: each letter is replaced by its alphabetical reverse pair.

Applying the Logic to CKSW

Now, we will apply this established logic (replacing each letter with its alphabetical reverse pair) to CKSW.

• First letter: C. The reverse pair of C is X (C <-> X). Position of C is 3, Position of X is 24. $3 + 24 = 27$.
• Second letter: K. The reverse pair of K is P (K <-> P). Position of K is 11, Position of P is 16. $11 + 16 = 27$.
• Third letter: S. The reverse pair of S is H (S <-> H). Position of S is 19, Position of H is 8. $19 + 8 = 27$.
• Fourth letter: W. The reverse pair of W is D (W <-> D). Position of W is 23, Position of D is 4. $23 + 4 = 27$.

Therefore, CKSW is related to XPHD.

Checking the Options

We look at the given options to find XPHD:

1. BJRV
2. HDPX
3. XPHD
4. DLTX

Option 3 matches our derived related string, XPHD.

Conclusion

The relationship between the letter strings in the given pairs is that each letter in the first string is replaced by its alphabetical reverse pair to obtain the corresponding letter in the second string. Applying this same logic to CKSW gives us XPHD.

Revision Table: Letter Series Pattern

Additional Information on Letter Coding and Analogy

Letter coding and analogy questions are common in logical and verbal reasoning sections of competitive exams. They test your ability to identify patterns and relationships between letters based on their alphabetical positions or sequence.

Common patterns include:

• Positional Shift: Each letter is shifted forward or backward by a fixed number of positions (e.g., A → C is a shift of +2). The shift might be constant for all letters or follow a specific sequence (+1, +2, +3, ...).
• Reverse Order: The letters in the related string might be the reverse of the original string's letters.
• Alphabetical Reverse Pairs: As seen in this problem, letters are replaced by their reverse pairs (A <-> Z, B <-> Y, etc.).
• Vowel/Consonant Logic: The pattern might differentiate between vowels and consonants.
• Combination of Patterns: Sometimes, a combination of these logic types is used within a single question.

To solve these questions effectively, it's helpful to know the alphabetical position of each letter and be quick at calculating shifts or identifying reverse pairs.