Understanding Letter Series Completion

Letter series completion questions require you to find a pattern in a given sequence of letters and then use that pattern to fill in the missing letters. The pattern can be repeating, follow a sequence based on letter positions, or have other logical rules.

Analyzing the Given Letter Series

The given series with blanks is:

C _ B N _ _ V _ _ H C _ B _ H

There are 15 positions in total. Let's count the blanks. The blanks are at positions 2, 5, 6, 8, 9, 11, and 14. There are a total of 7 blanks.

We are given four options, each containing a sequence of 7 letters to fill these blanks sequentially.

Strategy to Solve Letter Series Questions

A common strategy for this type of question is to test each option by inserting the letters into the blanks and then examining the resulting complete series to see if a clear, logical pattern emerges. Repeating patterns are very common in these series.

Testing Option 1: VHCBNVN

Let's insert the letters from Option 1 ('V', 'H', 'C', 'B', 'N', 'V', 'N') into the blanks at positions 2, 5, 6, 8, 9, 11, and 14 respectively.

• Position 2: V
• Position 5: H
• Position 6: C
• Position 8: B
• Position 9: N
• Position 11: V
• Position 14: N

Inserting these letters into the original series C _ B N _ _ V _ _ H C _ B _ H, we get the completed series:

C V B N H C V B N H C V B N H

Identifying the Pattern in the Completed Series

Let's look closely at the completed series: C V B N H C V B N H C V B N H

We can observe that the sequence of letters 'C V B N H' repeats three times consecutively to form the entire series of 15 letters (5 letters per block * 3 blocks = 15 letters).

Let's verify if this pattern matches the originally provided letters in the series:

• Position 1: C (matches)
• Position 3: B (matches)
• Position 4: N (matches)
• Position 7: V (matches)
• Position 10: H (matches)
• Position 12: C (matches)
• Position 13: B (matches)
• Position 15: H (matches)

All the original letters in the series align perfectly with the repeating pattern 'C V B N H'.

Testing the other options would reveal that they do not produce a consistent or easily identifiable pattern like the clear repetition found with Option 1.

Conclusion

The sequence of letters 'VHCBNVN' from Option 1 successfully completes the series to form a logical pattern of repeating blocks ('CVBNHCVBNHCVBNH'). Therefore, this is the correct combination.

Letter Series Revision Table

Additional Information on Series Completion

Letter series problems are a common part of logical reasoning tests. To improve your skills, practice identifying different types of patterns:

• Alphabetical Position: Patterns based on the position of letters in the alphabet (A=1, B=2, etc.).
• Skipping Letters: Patterns where letters are skipped in a regular sequence.
• Reversed Alphabet: Patterns using the alphabet in reverse order.
• Combination Patterns: More complex patterns combining different rules.
• Alternating Patterns: Two different patterns alternating within the same series.

Always write down the series, count the total terms and blanks, and methodically test potential patterns or the given options if provided.