Understanding the Letter Series Pattern

The question asks us to find the letters that complete the given letter series. This type of problem requires identifying the repeating pattern or sequence within the series.

The given letter series is:

L _ J _ G _ K _ H G _ K J H _ L _ _ H G

Let's count the total number of positions in the series and the number of blanks:

L(1) _(2) J(3) _(4) G(5) _(6) K(7) _(8) H(9) G(10) _(11) K(12) J(13) H(14) _(15) L(16) _(17) _(18) H(19) G(20)

There are 20 positions in total and 8 blanks. The blanks are at positions: 2, 4, 6, 8, 11, 15, 17, and 18.

Testing the Options to Complete the Series

We need to test each option by placing its letters sequentially into the blanks. Let's use the letters from the provided correct option, which is K H L J L G K J, and see if a clear pattern emerges.

The letters from the correct option are: K, H, L, J, L, G, K, J.

We place these letters into the blanks at positions 2, 4, 6, 8, 11, 15, 17, and 18:

• Blank 2 gets K
• Blank 4 gets H
• Blank 6 gets L
• Blank 8 gets J
• Blank 11 gets L
• Blank 15 gets G
• Blank 17 gets K
• Blank 18 gets J

Let's fill these letters into the original series step-by-step:

L K J _ G _ K _ H G _ K J H _ L _ _ H G

L K J H G _ K _ H G _ K J H _ L _ _ H G

L K J H G L K _ H G _ K J H _ L _ _ H G

L K J H G L K J H G _ K J H _ L _ _ H G

L K J H G L K J H G L K J H _ L _ _ H G

L K J H G L K J H G L K J H G L _ _ H G

L K J H G L K J H G L K J H G L K _ H G

L K J H G L K J H G L K J H G L K J H G

The completed series is:

L K J H G L K J H G L K J H G L K J H G

Identifying the Repeating Pattern

Let's examine the completed series:

L K J H G

L K J H G

L K J H G

L K J H G

We can clearly see that the sequence "L K J H G" repeats exactly four times.

The length of the repeating block is 5 letters (L, K, J, H, G). Since the total length of the series is 20, and $20 \div 5 = 4$, a repeating block of 5 letters makes sense.

By placing the letters K H L J L G K J into the blanks at positions 2, 4, 6, 8, 11, 15, 17, and 18, the series forms a perfect repetition of the block L K J H G.

Conclusion

The sequence of letters K H L J L G K J correctly completes the series by forming the repeating pattern L K J H G. Therefore, this option represents the correct sequence to fill the blanks.

Revision Table: Letter Series Analysis

Additional Information: Tips for Solving Letter Series

Solving letter series questions often involves identifying patterns. Here are some common types of patterns and strategies:

• Repeating Block: A specific sequence of letters repeats throughout the series, like in this problem.
• Alphabetical Progression: Letters might move forward or backward in the alphabet by a fixed number of steps or a varying number of steps.
• Skipping Letters: The pattern might involve skipping a certain number of letters between consecutive terms (e.g., A, C, E, G... skipping one letter).
• Combination of Patterns: Some series combine different rules, like a repeating block with a slight variation, or alternating patterns.
• Position-based Patterns: Sometimes the pattern depends on the position of the letter in the series or its position in the alphabet.

Strategy:

• Count the total number of letters and blanks.
• Look for recurring letters or groups of letters.
• Divide the series into potential blocks based on the length of the options or visible repeating parts.
• Test the options by filling the blanks and checking if a logical pattern (repetition, progression, etc.) emerges.
• Pay attention to variations in potential repeating blocks.