Number systems is one of the most consistently tested QA chapters in CAT, appearing in 17 of 18 slots across 2020–2025. With an average of 2.1 questions per slot at Easy-Moderate difficulty, it contributes meaningfully to your QA score in almost every paper.
| Year | Slot | Questions | Difficulty |
|---|---|---|---|
| 2020 | 1 | 2 | Moderate |
| 2020 | 2 | 1 | Easy-Moderate |
| 2020 | 3 | 4 | Easy-Moderate |
| 2021 | 1 | 1 | Easy |
| 2021 | 2 | 1 | Moderate |
| 2022 | 1 | 1 | Easy-Moderate |
| 2022 | 2 | 1 | Moderate |
| 2022 | 3 | 1 | Moderate-Difficult |
| 2023 | 1 | 1 | Easy |
| 2023 | 2 | 3 | Easy |
| 2023 | 3 | 4 | Easy-Moderate |
| 2024 | 1 | 2 | Moderate-Difficult |
| 2024 | 2 | 2 | Moderate-Difficult |
| 2024 | 3 | 2 | Easy-Moderate |
| 2025 | 1 | 3 | Easy-Moderate |
| 2025 | 2 | 4 | Moderate |
| 2025 | 3 | 3 | Easy-Moderate |
High frequency and manageable difficulty make Number systems one of the best return-on-investment chapters in CAT QA. If you can achieve solid proficiency here, the marks contribution across multiple slots adds up significantly.
Number systems has appeared in 17 of 18 CAT slots from 2020 to 2025, averaging 2.1 questions per slot at Easy-Moderate difficulty. It is one of the most reliably tested chapters in CAT QA.
The difficulty of Number systems 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 and manageable difficulty make Number systems a top-priority chapter. It appears in almost every slot and the questions are approachable with thorough preparation. This is one of the safest bets for marks in CAT QA.