Analyzing the Alphabetical Series Pattern

The question presents a series of three-letter combinations: BJL, EMO, HPR, KSU, and asks for the next term in the sequence based on the English alphabetical order. To solve this, we need to identify the pattern governing the progression of letters in each position within the terms.

Step 1: Represent Letters with Numerical Positions

First, let's assign numerical positions to each letter based on their order in the English alphabet (A=1, B=2, C=3, ..., Z=26).

• BJL: B (2), J (10), L (12)
• EMO: E (5), M (13), O (15)
• HPR: H (8), P (16), R (18)
• KSU: K (11), S (19), U (21)

Step 2: Identify the Pattern in Each Position

Now, let's examine the difference between consecutive terms for each letter position:

Pattern for the First Letter:

• From B (2) to E (5): The difference is \(5 - 2 = 3\).
• From E (5) to H (8): The difference is \(8 - 5 = 3\).
• From H (8) to K (11): The difference is \(11 - 8 = 3\).

The pattern for the first letter is adding 3 to the alphabetical position.

Pattern for the Second Letter:

• From J (10) to M (13): The difference is \(13 - 10 = 3\).
• From M (13) to P (16): The difference is \(16 - 13 = 3\).
• From P (16) to S (19): The difference is \(19 - 16 = 3\).

The pattern for the second letter is also adding 3 to the alphabetical position.

Pattern for the Third Letter:

• From L (12) to O (15): The difference is \(15 - 12 = 3\).
• From O (15) to R (18): The difference is \(18 - 15 = 3\).
• From R (18) to U (21): The difference is \(21 - 18 = 3\).

The pattern for the third letter is consistently adding 3 to the alphabetical position.

Step 3: Apply the Pattern to Find the Next Term

To find the term that replaces the question mark (?), we apply the "+3" pattern to the last term (KSU):

• Next First Letter: K (11) + 3 = 14. The 14th letter is N.
• Next Second Letter: S (19) + 3 = 22. The 22nd letter is V.
• Next Third Letter: U (21) + 3 = 24. The 24th letter is X.

Therefore, the next term in the series is NVX.

Summary Table

Based on the consistent +3 pattern observed in each letter position across the series, the missing term is NVX.