Sequence and Series
19 CDS Mathematics previous year questions (PYQs) from 14 papers, 2016 to 2025, with answers and worked solutions.
About this chapter
- Difficulty: 4 easy · 13 moderate · 2 hard.
- Most-asked subtopics: Progressions and Special Sums (10), Arithmetic, Geometric and Harmonic Means (9).
- Updated 6 September 2026.
#1Progressions and Special Sums
#2Progressions and Special Sums
#3Progressions and Special Sums
#4Progressions and Special Sums
#5Progressions and Special Sums
Done a few? Here’s your next move
#6Progressions and Special Sums
#7Progressions and Special Sums
#8Progressions and Special Sums
#9Progressions and Special Sums
#10Progressions and Special Sums
#11Arithmetic, Geometric and Harmonic Means
#12Arithmetic, Geometric and Harmonic Means
#13Arithmetic, Geometric and Harmonic Means
#14Arithmetic, Geometric and Harmonic Means
#15Arithmetic, Geometric and Harmonic Means
#16Arithmetic, Geometric and Harmonic Means
#17Arithmetic, Geometric and Harmonic Means
#18Arithmetic, Geometric and Harmonic Means
#19Arithmetic, Geometric and Harmonic Means
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