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Progressions and Series — Study Plan

CAT · Quantitative Aptitude

Step-by-step Progressions and Series study plan for CAT Quantitative Aptitude 2026 — structured month-wise approach to mastering this chapter.

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An infographic defining arithmetic progression, showing how terms increase or decrease by a common difference, with examples of numerical and algebraic APs.
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How to Study Progressions and Series

A structured approach to studying Progressions and Series for CAT Quantitative Aptitude.

Study Plan for Progressions and Series

1

Day 1–2: Learn the Theory

Study the chapter thoroughly. Note down definitions, formulas, and key concepts.

2

Day 3: Practice Problems

Solve practice questions and previous year CAT problems. There are 59 questions available for this chapter.

3

Day 4: Revise & Test

Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding.

What to Focus On

  • A progression is a sequence following a specific pattern
  • Each number in the sequence is called a term
  • The position of a term determines its term number

  • Common difference d = any term - previous term
  • nth term formula: Tn = a + (n-1)d
  • Sum formula: Sn = n/2[2a + (n-1)d]

  • Common difference = (difference in term values)/(difference in positions)
  • Sum repetition occurs in increasing APs with negative first terms
  • Arithmetic mean of a and b = (a+b)/2

Common Mistakes to Avoid

In an arithmetic progression, if the sum to n₁ terms equals the sum to n₂ terms, then all terms between position n₁ and n₂ must be zero

The formula Tₙ = a + (n-1)d should always be used to find any term in an AP

In a geometric progression, if r > 1, the sum always increases without bound

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Frequently Asked Questions

What topics are covered in Progressions and Series for CAT?
Progressions and Series is an important chapter in CAT Quantitative Aptitude. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Arithmetic Progressions (AP), Geometric Progressions (GP), Harmonic Progressions (HP), Advanced Concepts and Applications.
How important is Progressions and Series for CAT?
Progressions and Series is a frequently tested chapter in CAT Quantitative Aptitude. Questions from this chapter appear regularly in previous year papers. There are 59 practice questions available for this chapter.
How to prepare Progressions and Series for CAT?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.

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