IEO Answer Key 2025-26– SOF has released the IEO 2025 answer key for level 1 SET A on November 3. The SET B and SET C answer key for IEO 2025-26 will be released soon. The Science Olympiad Foundation (SOF) conducted the SET A exam on September 26, 2025 while the IEO Set B and Set C exams are scheduled to be conducted on November 11, and November 26, 2025, respectively. SOF will release the level 1 IEO answer key 2025 in PDF format.
The conducting body will also release the IEO cut-off for classes 1 to 12 after the result announcement. Read the article to know the details on IEO answer key release date 2025-26, how to download the IEO answer key pdf and more.
IEO Answer Key 2025-26 Release Date
SOF has released the IEO answer key release date. Below is the IEO 2025 answer key release date for SET A, B & C.
SOF IEO Answer Key Date
| Events | Important Date |
| Level 1 IEO 2025 Exam Date | SET A- September 26, 2025SET B- November 11, 2025SET C- November 26, 2025 |
| IEO SET A Answer Key Release Date | November 3, 2025 |
| SET B IEO Answer Key Release Date | November 2025 |
| IEO SET C Answer Key Release Date | December2025 |
| Level 1 Result Date | January 2026 |
SOF releases the IEO 2025-26 answer key at sofworld.org separately for each class and set of papers. The IEO answer key for classes 1 to 12 is released to offer transparency in the scholarship process.
How to download the SOF IEO Answer Key 2025-26?
Candidates must follow the given steps to download the IEO answer key effectively without any error.
- Visit the official IEO answer key website at sofworld.org
- Now, select the option ‘SOF Answer Key and Cut off 2025-26’
- Click on IEO Answer Key Link for Set A, Set B, Set C.
- Download the IEO answer key pdf for the respective class.
- Calculate the scores by adding up the marks for the correct answer.
Official IEO SET A Answer Key Link
| IEO Level 1 Answer Key Name | Set-A |
| IEO Class 1 Answer Key | Download Link |
| IEO Class 2 Answer Key | |
| IEO Class 3 Answer Key | |
| IEO Class 4 Answer Key | |
| IEO Class 5 Answer Key | |
| IEO Class 6 Answer Key | |
| IEO Class 7 Answer Key | |
| IEO Class 8 Answer Key | |
| IEO Class 9 Answer Key | |
| IEO Class 10 Answer Key | |
| IEO Class 11 Answer Key | |
| IEO Class 12 Answer Key |
IEO SET B Answer Key PDF Download Link
| IEO Level 1 Answer Key Name | Set-B |
| IEO Class 1 Answer Key | To Be Uploaded |
| IEO Class 2 Answer Key | To Be Uploaded |
| IEO Class 3 Answer Key | To Be Uploaded |
| IEO Class 4 Answer Key | To Be Uploaded |
| IEO Class 5 Answer Key | To Be Uploaded |
| IEO Class 6 Answer Key | To Be Uploaded |
| IEO Class 7 Answer Key | To Be Uploaded |
| IEO Class 8 Answer Key | To Be Uploaded |
| IEO Class 9 Answer Key | To Be Uploaded |
| IEO Class 10 Answer Key | To Be Uploaded |
| IEO Class 11 Answer Key | To Be Uploaded |
| IEO Class 12 Answer Key | To Be Uploaded |
IEO SET C Answer Key 2025
| Class | IEO Set C Answer Key |
| IEO Class 1 Answer Key | To Be Uploaded |
| IEO Class 2 Answer Key | To Be Uploaded |
| IEO Class 3 Answer Key | To Be Uploaded |
| IEO Class 4 Answer Key | To Be Uploaded |
| IEO Class 5 Answer Key | To Be Uploaded |
| IEO Class 6 Answer Key | To Be Uploaded |
| IEO Class 7 Answer Key | To Be Uploaded |
| IEO Class 8 Answer Key | To Be Uploaded |
| IEO Class 9 Answer Key | To Be Uploaded |
| IEO Class 10 Answer Key | To Be Uploaded |
| IEO Class 11 Answer Key | To Be Uploaded |
| IEO Class 12 Answer Key | To Be Uploaded |
How to Calculate Scores With SOF IEO Answer Key 2025?
Candidates will get marks from a total of 40 for Class 1 to 4 and 60 from class 5 to 12. For each correct answer, students will get +1 marks. Candidates have to match their response with the answers mentioned in the IEO answer key pdf. Add the respective marks for each correct answer.
SOF IEO Questions & Marks
| Classes | Section | No. of Questions | Marks/Question | Total Marks |
| Class 1-4 | Word and Structure Knowledge | 15 | 1 | 15 |
| Reading | 10 | 1 | 10 | |
| Spoken and Written Expression | 5 | 1 | 5 | |
| Achievers Section | 5 | 2 | 10 | |
| Grand Total | 35 | 40 | ||
| Class 5-12 | Word and Structure Knowledge | 30 | 1 | 30 |
| Reading | 10 | 1 | 10 | |
| Spoken and Written Expression | 5 | 1 | 5 | |
| Achievers Section | 5 | 3 | 15 | |
| Grand Total | 50 | 60 |
IEO Cut-Off Scores
After calculating the marks, candidates should match with the IEO last year’s cut off to know whether they have any probability of getting the award or not. Below is the past year’s cut off marks.
SOF IEO 1st Level Cut-Off 2023-24 – Top 5%
| Class | Total Marks | Achievers Section [M4] |
Word And Structure Knowledge [M1] |
Reading [M2] |
Spoken And Written Expression [M3] |
| 3 | 33 | 8 | 11 | 10 | 4 |
| 4 | 35 | 8 | 13 | 10 | 4 |
| 5 | 43 | 9 | 21 | 10 | 3 |
| 6 | 46 | 9 | 24 | 8 | 5 |
| 7 | 45 | 9 | 23 | 9 | 4 |
| 8 | 48 | 12 | 23 | 9 | 4 |
| 9 | 49 | 12 | 24 | 9 | 4 |
| 10 | 47 | 9 | 23 | 10 | 5 |
| 11 | 48 | 12 | 27 | 4 | 5 |
| 12 | 47 | 9 | 23 | 10 | 5 |
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