International Science Olympiad (ISO) – Complete Preparation (Class 1 to 10)
👇 Start with a free mock test for your class and see your score instantly.
Prepare for the SOF International Science Olympiad (ISO), earlier known as the National Science Olympiad (NSO), with structured practice designed to build strong concepts, improve accuracy, and boost confidence.
What You Get in This ISO Collection
Weekly Mock Tests
- Full-length tests based on the latest ISO exam pattern
- Instant scoring and performance feedback
- Real exam-like experience
Sample Papers
- Based on expected question trends
- Ideal for revision before exams
Chapter-Wise Practice
- Topic-wise tests for full syllabus coverage
- Helps identify and improve weak areas
- Builds strong conceptual clarity
Why Practice with Olympiadtester?
- Free online access to mock tests
- Structured preparation aligned with SOF syllabus
- Practice across all difficulty levels
- Designed for real Olympiad performance improvement
ISO Exam Pattern (Quick Overview)
Classes 1 to 4
- 35 Questions
- Logical Reasoning + Science + Achievers Section
Classes 5 to 10
- 50 Questions
- Logical Reasoning + Science + Achievers Section
Why Olympiad Preparation Matters
Olympiad exams develop analytical thinking, problem-solving skills, and deeper conceptual understanding—skills essential for future competitive exams.
What is the ISO Olympiad?
The International Science Olympiad (ISO) is conducted by SOF and tests students beyond textbooks through concept-based and application-driven questions.
How to Start
- Select your class from the collection above
- Open your test dashboard
- Start practising instantly
Free to attempt • Instant access • No downloads required
Benchmark Your Performance with GOTAK
The GOTAK Science Olympiad by Olympiadtester helps students measure their performance beyond standard Olympiad levels.
- Advanced-level questions
- Global-level benchmarking
- Designed for top rankers
FAQs – ISO Preparation on Olympiadtester
Are ISO mock tests really free on Olympiadtester?
Yes. All mock tests are free to attempt online. Additional downloadable resources are available with an upgrade.
How are Olympiadtester tests different from school exams?
Our tests focus on application, logic, and higher-order thinking rather than direct textbook questions.
Can students improve their ISO ranking using mock tests?
Yes. Regular practice improves speed, accuracy, and familiarity with Olympiad-level questions.
Do these tests follow the latest SOF syllabus?
Yes. All tests are aligned with the latest ISO (NSO) syllabus and exam pattern.
Explore More Olympiads
More SOF Olympiads
- International Mathematics Olympiad (IMO)
- International Computer Science Olympiad (ICSO)
- International English Olympiad (IEO)
- International General Knowledge Olympiad (IGKO)
- International Social Studies Olympiad (ISSO)
Other Science Olympiads
Start Your ISO Preparation Today
Scroll up, choose your class, and begin practising with structured mock tests designed for Olympiad success.