Sequences describe ordered lists of numbers that follow a clear pattern, while series describe the sum of the terms in such lists. These ideas help students recognize structure, repetition, and growth in a very intuitive way. A good understanding of sequences and series is an essential part of any complete GMAT preparation course. This page offers you an organized subtopic wise playlist, along with a few worked examples, for efficient preparation of this concept.

Arithmetic Progression (AP)

Arithmetic progressions are both useful and graceful, and they appear regularly on the GMAT. In such a sequence, each term differs from the previous one by a fixed amount, forming the backbone of many well structured problems. If you master this idea early in your GMAT prep, it becomes a powerful ally, since its simplicity creates strong relationships that save valuable time. The skill to spot the nth term or find the total sum without adding term by term shows how crucial it is to recognize patterns quickly. The short video below explains this approach from first principles, shows it on GMAT like items, and prepares you to use it in drills, sectional tests, and full-length GMAT diagnostic tests.

Geometric Progression (GP)

Geometric progressions form a key part of sequences and series, and they often sit at the heart of elegant GMAT problems. In a geometric progression, each term is produced by multiplying the previous term by a constant ratio. Unlike arithmetic progressions, which increase by repeated addition, geometric progressions grow or shrink through multiplication, creating patterns that rise sharply or fade quickly. Their real strength lies in the formulas that allow you to find the nth term, the sum of a fixed number of terms, and even the sum of infinitely many terms under certain conditions. These relationships let you manage very large terms and complicated looking series without writing out every term. A solid grasp of these formulas, along with the reasoning behind them, saves time and cuts down on errors. The following short video presents this idea step by step and shows how it can be tested on the GMAT.

Summation Formulas: Sum of First n Integers, Squares, Cubes…

Summation formulas are some of the most elegant and powerful tools in mathematics. Rather than adding terms one by one, these relationships let you reach the final sum in a single, confident step. On the GMAT, questions involving sums of consecutive integers, even numbers, odd numbers, or powers can look long and tiring if handled manually. With the right formulas, though, they become crisp and efficient. For instance, the sum of the first n natural numbers, or the first n squares, can be found in moments once you know the underlying patterns. These ideas are not only about saving time; they are about recognizing structure where others see only repetition. That is why regular practice with these formulas is essential for true fluency. The brief video that follows gives a warm, clear explanation of this idea and shows how it can show up on the GMAT.

How and Where to Practice GMAT Sequences and Series Questions

Real practice for Sequences and Series problems begins when you solve them on a software simulation that closely matches the official GMAT interface. You need a platform that presents the question stem and the sequence or series framework in a GMAT like layout, lets you work with the information and answer choices naturally, and provides all the on screen tools and functionalities that you will see on the actual exam. Without this kind of experience, it is difficult to feel fully prepared for test day. High quality Sequences and Series questions are not available in large numbers. Among the limited, genuinely strong sources are the official practice materials released by GMAC and the Experts’ Global GMAT course.

Within the Experts’ Global GMAT online preparation course, every Sequences and Series problem appears on an exact GMAT like user interface that includes all the real exam tools and features. You work through more than 40 Sequences and Series questions in quizzes and also take 15 full-length GMAT mock tests that include several Sequences and Series questions in roughly the same spread and proportion in which they appear on the actual GMAT.

All the best!