IMO Class 4 — Mathematics
Key Class 4 topics: Numbers up to 6 digits and place value, Factors and multiples, Four operations on large numbers, Fractions and decimals, Measurement of length, mass and capacity and more.
2026–27 · 5 olympiads
Olympiads for Class 4: IMO, IEO, NSO, IGKO, ISSO
A Class 4 student can sit 5 SOF olympiads this year. Compare the exam patterns below, open the class-wise syllabus for each, and practise with free tests and full-length mock exams that give an instant all-India rank.
Class 4 olympiad exam patterns at a glance
| Olympiad | Subject | Questions | Duration | Level 2 | Level 1 dates |
|---|---|---|---|---|---|
| IMO | Mathematics | 35 | 60 min | Yes | Oct 22 / Nov 19 / Dec 10, 2026 |
| IEO | English | 40 | 60 min | Yes | Sept 24 / Oct 20 / Nov 5, 2026 |
| NSO | Science | 40 | 60 min | Yes | Oct 15 / Nov 12 / Dec 3, 2026 |
| IGKO | General Knowledge | 35 | 45 min | No | Sept 10 / Oct 1, 2026 |
| ISSO | Social Studies | 40 | 60 min | No | Nov 30, 2026 / Jan 19, 2027 |
No SOF olympiad has negative marking. Dates are tentative — see exam dates and confirm with your school.
IEO Class 4 — English
Key Class 4 topics: Nouns, pronouns and adjectives, Verbs and tenses, Adverbs and prepositions, Conjunctions and articles, Subject–verb agreement and more.
NSO Class 4 — Science
Key Class 4 topics: Plants: adaptation and reproduction, Animals: adaptation and food habits, Food and digestion, Teeth and the digestive system, Clothes and fibres and more.
IGKO Class 4 — General Knowledge
Key Class 4 topics: India: states, capitals and national symbols, World: countries, capitals and currencies, Famous monuments and landmarks, Science in everyday life, Inventions and discoveries and more.
ISSO Class 4 — Social Studies
Key Class 4 topics: States, capitals and union territories, Physical features of India, Climate and soils of India, Natural resources and their conservation, Agriculture and industries and more.
Class 4 olympiads — frequently asked questions
Which olympiads can a Class 4 student take?
Class 4 students can take the IMO, IEO, NSO, IGKO and ISSO. Each is a separate exam on a different date.
Which olympiad is best for Class 4?
Start with the subject your child enjoys most. Many Class 4 students take IMO and NSO first, then add IEO, IGKO or ISSO once they are comfortable with the format.
Can a Class 4 student appear for more than one olympiad?
Yes. The olympiads are held on different dates, so students commonly take two or three in one year.
Is there a Level 2 for Class 4?
Yes, for IMO, IEO, NSO. Top Level 1 performers qualify for the second round.
Practise every Class 4 olympiad in one place
Free account · first full mock exam free · instant rank and solutions.