The Science Olympiad Foundation (SOF) conducts the International Science Olympiad (ISO), previously known as the National Science Olympiad (NSO). The SOF ISO sample question paper 2026-27 with answers has been released online. Students preparing for the ISO exam can download the class-wise ISO sample papers 2026-27 from the official website at sofworld.org.
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Students can solve the ISO sample question papers 2026-27 to understand the exam pattern, types of questions, and marking scheme. This year, the Level 1 ISO 2026-27 will be conducted in three sets: Set A on October 30, 2026, Set B on November 19, 2026, and Set C on December 3, 2026. Read more to get details on the SOF ISO 2026-27 sample question papers and answers.
Students can go through the related details of the SOF ISO exam 2026-27 before downloading the sample papers.
Particulars | Details |
|---|---|
Exam name | International Science Olympiad (ISO) (also known as NSO) |
Conducted by | Science Olympiad Foundation (SOF) |
Classes | Classes 1 to 12 |
SOF ISO exam date 2026-27 |
|
Mode of examination | Offline |
Medium of the examination | English |
Duration | 1 hour |
Official website | sofworld.org |
Also check: ISO Syllabus 2026-27
Students can click on the download links mentioned below to download the class-wise ISO sample papers 2026-27 PDFs with answers.
Class | |
|---|---|
Download Links | |
SOF ISO Class 1 sample paper 2026-27 | |
SOF ISO Class 2 sample paper 2026-27 | |
SOF ISO Class 3 sample paper 2026-27 | |
SOF ISO Class 4 sample paper 2026-27 | |
SOF ISO Class 5 sample paper 2026-27 | |
SOF ISO Class 6 sample paper 2026-27 | |
SOF ISO Class 7 sample paper 2026-27 | |
SOF ISO Class 8 sample paper 2026-27 | |
SOF ISO Class 9 sample paper 2026-27 | |
SOF ISO Class 10 sample paper 2026-27 | |
SOF ISO Class 11 sample paper 2026-27 | Available Soon |
SOF ISO Class 12 sample paper 2026-27 |
Get your results instantly with our calculator!
To download the ISO sample question papers 2026-27 for each class, students can follow the steps mentioned below.
Visit the official website at sofworld.org.
On the homepage, check the menu bar and click on the ‘SOF ISO’ option.
A drop-down menu will appear on the screen.
Select ‘Sample Model Papers’ from the options and open the page as shown below.

The list of class-wise sample papers will appear on the screen.
Click on the links and download the SOF ISO sample paper for 2026-27.
Below, we have provided a few sample questions and answers for the ISO 2026-27 examination. These questions are available in the PDFs provided on the website as well.

Answer: (B) 4

Answer: (B) Anu

Answer: (A) 22

Answer: (C) Dodder

Answer: (A) Beriberi

Answer: (D)
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