Sequence & Series
93 NDA Mathematics previous year questions (PYQs) from 19 papers, 2017 to 2026, with answers and worked solutions.
About this chapter
- Difficulty: 28 easy · 46 moderate · 19 hard.
- Most-asked subtopics: Arithmetic Progressions (44), Geometric Progressions (20), Interrelating AP, GP and HP (16).
- Updated 14 September 2026.
- NDA · Sep 2026 · Q30Moderate
#1Arithmetic Progressions
- NDA · Sep 2026 · Q32Moderate
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- NDA · Apr 2017 · Q10Moderate
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- NDA · Apr 2018 · Q31Moderate
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- NDA · Sep 2018 · Q26Moderate
#9Arithmetic Progressions
- NDA · Apr 2019 · Q23Moderate
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- NDA · Sep 2019 · Q15Moderate
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- NDA · Apr 2021 · Q48Moderate
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- NDA · Sep 2021 · Q33Moderate
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- NDA · Sep 2021 · Q44Moderate
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- NDA · Apr 2022 · Q52Moderate
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- Set · 3 questionsConsider the following for the next three (03) items that follow: Let P be the sum of first n positive terms of an increasing arithmetic progression A. Let Q be the sum of first n positive terms of another increasing arithmetic progression B. Let P : Q = (5n+4) : (9n+6)
- NDA · Sep 2022 · Q19Moderate
#25Arithmetic Progressions
- NDA · Sep 2022 · Q20Moderate
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- NDA · Apr 2023 · Q16Moderate
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- NDA · Sep 2025 · Q7Moderate
#33Arithmetic Progressions
- Set · 2 questionsFor the following two (02) items: Let up to terms up to terms where and .
- NDA · Sep 2025 · Q33Moderate
#34Arithmetic Progressions
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- NDA · Sep 2023 · Q6Moderate
#36Arithmetic Progressions
- Set · 2 questionsLet be in AP such that .
- NDA · Sep 2023 · Q71Moderate
#37Arithmetic Progressions
- NDA · Sep 2023 · Q72Moderate
#38Arithmetic Progressions
- NDA · Sep 2024 · Q7Moderate
#39Arithmetic Progressions
#40Arithmetic Progressions
- NDA · Sep 2024 · Q38Moderate
#41Arithmetic Progressions
- Set · 2 questionsThe product of 5 consecutive terms of an AP is 229635. The first, second and fifth terms are in GP.
#42Arithmetic Progressions
- NDA · Sep 2024 · Q44Moderate
#43Arithmetic Progressions
#44Arithmetic Progressions
- NDA · Sep 2026 · Q33Moderate
#45Geometric Progressions
- NDA · Apr 2017 · Q8Moderate
#46Geometric Progressions
- NDA · Apr 2017 · Q22Moderate
#47Geometric Progressions
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Showing the first 50 of 93.
See all 93 questionsMore chapters in this subject
- 3D Geometry94
- Application of Derivatives76
- Applications of Integration27
- Binomial Distribution31
- Binomial Theorem56
- Circles28
- Complex Numbers76
- Conics40
- Definite Integration69
- Differential Equations67
- Differentiation89
- Functions115
- Height & Distance26
- Indefinite Integration42
- Inverse Trigonometry36
- Limits & Continuity87
- Lines104
- Logarithms27
- Matrices & Determinants181
- Permutation & Combination80
- Probability176
- Properties of Triangle52
- Quadratic Equations67
- Sets & Relations75
- Statistics165
- Trigonometric Equations34
- Trigonometric Identities145
- Vectors102