Number and Alphabet Series

intermediate24 min read

The patterns behind number series and alphabet series, the fixed routine for finding the next term, and the 'wrong term' variant where one entry breaks an otherwise clean rule.

What you will be able to do

Test a number series for a difference, ratio, or square-and-cube pattern.
Handle two-tier series where the differences themselves form a pattern.
Find the single wrong term by assuming the rule from the majority of terms.
Work an alphabet or alphanumeric series using letter position numbers.

What is inside this lesson

1What a series question asks
2The common number patterns
3The wrong-term variant
4Alphabet and alphanumeric series
5Worked examples
6Common mistakes
7Quick revision
8Practice

The lesson itself is for members

Reading the 8 sections above, the worked examples and the practice set is free — the whole knowledge base is on the free plan, along with flashcards, private notes and Ask Onely.

Create a free account Sign in