All the information has been copied from the official IARCS website.
ZIO 2023
Qualifying cutoff
- Std 12: 40
- Std 11: 35
- Std 10: 30
- Std 9: 25
- Std 8 and below: 20
The cutoff score is relaxed by 5 marks for female students in each category.
Score distribution
| Score | Number at or below this score |
|---|---|
| 80 | 0 |
| 75 | 0 |
| 70 | 1 |
| 65 | 4 |
| 60 | 8 |
| 55 | 14 |
| 50 | 26 |
| 45 | 44 |
| 40 | 66 |
| 35 | 90 |
| 30 | 107 |
| 25 | 144 |
| 20 | 172 |
| 15 | 193 |
| 10 | 244 |
| 5 | 343 |
| 0 | 449 |
ZIO 2024
Qualifying cutoff
- Std 12: 55
- Std 11: 50
- Std 10: 45
- Std 9: 40
- Std 8 and below: 35
The cutoff score is relaxed by 5 marks for female students in each category.
Score distribution
| Score | Number at or above this score |
|---|---|
| 80 | 6 |
| 75 | 6 |
| 70 | 14 |
| 65 | 20 |
| 60 | 36 |
| 55 | 51 |
| 50 | 90 |
| 45 | 110 |
| 40 | 138 |
| 35 | 160 |
| 30 | 195 |
| 25 | 220 |
| 20 | 252 |
| 15 | 275 |
| 10 | 305 |
| 5 | 322 |
| 0 | 332 |
ZIO 2025
Qualifying cutoff
Male students
- Std 12: 40
- Std 11: 40
- Std 10: 35
- Std 9: 30
- Std 8: 25
- Std 7 and below: 20
Female students
- Std 12: 25
- Std 11: 25
- Std 10: 25
- Std 9: 20
- Std 8: 20
- Std 7 and below: 20
Score distribution
| Score | Number at or above this score |
|---|---|
| 80 | 0 |
| 75 | 0 |
| 70 | 0 |
| 65 | 0 |
| 60 | 0 |
| 55 | 3 |
| 50 | 17 |
| 45 | 27 |
| 40 | 50 |
| 35 | 88 |
| 30 | 145 |
| 25 | 238 |
| 20 | 299 |
| 15 | 325 |
| 10 | 362 |
| 5 | 385 |
| 0 | 421 |