Series is one of the most consistently tested QA chapters in CAT, appearing in 15 of 18 slots across 2020–2025. With an average of 1.1 questions per slot at Moderate difficulty, it contributes meaningfully to your QA score in almost every paper.
| Year | Slot | Questions | Difficulty |
|---|---|---|---|
| 2020 | 2 | 1 | Moderate-Difficult |
| 2020 | 3 | 1 | Easy-Moderate |
| 2021 | 2 | 1 | Easy-Moderate |
| 2021 | 3 | 1 | Moderate-Difficult |
| 2022 | 1 | 1 | Easy-Moderate |
| 2022 | 2 | 2 | Moderate |
| 2022 | 3 | 1 | Moderate-Difficult |
| 2023 | 1 | 1 | Moderate-Difficult |
| 2023 | 2 | 2 | Moderate-Difficult |
| 2023 | 3 | 1 | Moderate |
| 2024 | 1 | 1 | Moderate |
| 2024 | 2 | 1 | Moderate |
| 2024 | 3 | 1 | Moderate |
| 2025 | 2 | 1 | Moderate-Difficult |
| 2025 | 3 | 1 | Easy-Moderate |
Series appears in almost every slot and sits at moderate difficulty — meaning a prepared candidate can reliably convert these questions. It is a core chapter for any student targeting the 90th percentile or above.
Series has appeared in 15 of 18 CAT slots from 2020 to 2025, averaging 1.1 questions per slot at Moderate difficulty. It is one of the most reliably tested chapters in CAT QA.
The difficulty of Series has remained broadly consistent across 2020–2025, with no strong trend toward becoming harder or easier. The slot-to-slot variation is present but averages out over time.
Yes — high frequency means Series will almost certainly appear in your slot. Moderate difficulty means solid preparation pays off reliably. Prioritise it in your study schedule.