Alphabet series: A, G, L, P, S, ? Determine the next letter by examining the jump sizes between alphabetical positions.

Introduction / Context:
This is a classic letter-series problem built on arithmetic jumps in alphabet positions. The task is to find a consistent step between consecutive letters and then extend that rule to predict the next item.

Given Data / Assumptions:

• Series: A, G, L, P, S, ?
• Alphabet index: A=1, …, Z=26.
• Assume a steady change (increase) in position values.

Concept / Approach:
Convert each letter to its numeric position, compute the successive differences, and look for a consistent pattern. Apply the same increment to the last known term to get the answer.

Step-by-Step Solution:

Verification / Alternative check:

Why Other Options Are Wrong:

• W, X, Y require larger jumps (+4, +5, +6) that contradict the clearly shrinking step size.

Common Pitfalls:
Assuming a constant step size or skipping the numeric translation. Converting letters to numbers helps reveal simple arithmetic patterns instantly.

Final Answer:
U