Spotting arithmetic sequences
Spotting arithmetic sequences

A sequence is an ordered list of numbers, where each number is called a term. In an arithmetic sequence, the gap between consecutive terms is always the same; this constant gap is called the common difference, ddd.
Step-by-step lessons on Edexcel IGCSE Maths Sequences (Higher). Each one builds up to exam-style questions. Build confidence with the shared Foundation-tier content first, since roughly 40% of Higher-tier marks are targeted at the grades 4–5 boundary that both tiers have in common.