Letter Series
A letter series works the same way as a number series, but the pattern is expressed through positions in the alphabet (A=1 through Z=26) rather than raw numbers. The skill is converting letters to positions, spotting the numeric pattern, and converting back.
Common patterns
- A constant gap between letters (e.g. every 2nd letter)
- A gap that itself increases each step
- Moving backward through the alphabet
- Two interleaved sequences moving in different directions
Worked example
Question: A, C, E, G, ?
Answer: I
Each letter skips one letter forward — a gap of 2 in alphabet position.
How to approach Letter Series
Identify the information given, test the simplest consistent rule, and verify that your rule explains every relevant part before answering.