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SOF Answer Key 2025-26 Out, Download OMR Sheet PDF

SOF Answer Key 2025-26 provides correct solutions for all Olympiad exam questions, helping students verify responses and estimate their scores. Separate answer keys are released for IMO, NSO, IEO, and other Olympiads. Students can download the official key from the SOF website sofworld.org. 

authorImageDivya Sharma21 Nov, 2025
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SOF Answer Key

SOF Answer Key 2025-26 (Out) is an important document for all the candidates who take part in the various Olympiad exams conducted by the Science Olympiad Foundation (SOF). The SOF holds many exams, like the IMO, NSO, IEO, IGKO, etc. The SOF Answer Key contains all the correct answers to the questions asked in the exam. Candidates use this key to check their answers and calculate their expected scores before the official results are announced. 

SOF Answer Key PDF

SOF Answer Key for all classes and all sets is released in the form of a PDF file. Each PDF file lists the question numbers and the corresponding correct options (like A, B, C, or D). The PDF is organised by the specific Olympiad (e.g., IMO), the Set (e.g., Set A), and the Class (e.g., Class 6). Candidates can download this SOF Answer Key PDF to compare the answers they marked on their OMR sheets with the official correct answers.

SOF Answer Key PDF

SOF ICSO ANSWER KEYS- 2025-26 SET A

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SOF ISSO ANSWER KEYS- 2025-26 SET A

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SOF ICO ANSWER KEYS- 2025-26 SET A

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SOF IHO ANSWER KEYS- 2025-26 SET A

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SOF IEO ANSWER KEYS- 2025-26 SET A

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SOF IGKO ANSWER KEYS- 2025-26 SET A

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Steps To Download SOF Olympiad Answer Key 2025-26

Candidates can follow these simple steps to download the SOF Answer Key from the official website. 

Step 1: Go to the official Science Olympiad Foundation (SOF) website at www.sofworld.org.

Step 2: Look for the link that says "Answer Keys & Cut Off" or something similar on the homepage.

Step 3: Click on the link for the specific Olympiad exam you appeared for (e.g., SOF NSO Answer Keys).

Step 4: Candidates will see links for different sets (Set A, Set B, Set C) and different classes. Click on the link that matches the Set of your question paper and your Class number.

Step 5: The SOF Answer Key PDF will open on the screen. Candidates can download and save this file on their device.

Calculate Marks Using the SOF Exam Answer Key

Candidates should have an idea of the marking scheme to calculate the marks using the SOF Exam Answer Key. 

  • Get the Answer Key: Download the correct SOF Answer Key (matching your Olympiad, Class, and Set).

  • Compare Answers: Carefully compare each answer you marked on your OMR sheet with the correct answer in the key.

  • Apply Marks: Add 1 mark correct answer and 3 marks for a correct answer in achievers section. There is no negative marking for wrong attempts. 

  • Find the Total: Add up the marks for all your correct answers. The total is your estimated score.

 

SOF Answer Key 2025-26 FAQs

When will the SOF Answer Key be released for the Olympiads?

The SOF Answer Key is released on the official website about three to four weeks after the exam date for the specific Olympiad.

Is there any negative marking in the SOF Olympiad exams?

There is no negative marking in any of the SOF Olympiad exams. Candidates should add 0 marks for wrong or unattempted questions.

Where can I find the correct SOF Answer Key for my paper?

Candidates must find the answer key on the official website www.sofworld.org and make sure they click the link for their specific Olympiad, Class, and Question Paper Set (A, B, or C).

Can a candidate challenge the SOF Answer Key if they find a mistake?

The SOF does not provide a formal window for candidates to challenge the answer key. However, schools can sometimes raise a query with the foundation if a clear error is noticed.
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