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Olympiad practice for Class 3

Daily practice for the SOF IMO, NSO and IEO, plus 58 more olympiads a Class 3 child can sit, in Maths, Science, English, Logical Reasoning and Computers. Every answer comes with an explanation.

Free: 10 questions every day, forever, no card needed. Till 30 Nov 2026, PrepMojo Plus is free for every child (Navratri and Diwali Offer).

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Try 10 real Class 3 questions

Straight from the PrepMojo question bank, written to the pattern of the SOF papers. Have a go, then open the answer.

  1. Question 1 · Maths

    In the number 482, what is the value of the digit 2?

    1. A.2
    2. B.80
    3. C.20
    4. D.200
    Show answer

    Answer: A. 2

    Counting from the right, the 2 in 482 is in the ones place, so it is worth 2 × 1 = 2.

  2. Question 2 · Maths

    Asha buys a kite for ₹37 and pays with a ₹50 note. How much change does she get back?

    1. A.₹23
    2. B.₹3
    3. C.₹13
    4. D.₹37
    Show answer

    Answer: C. ₹13

    Change is what comes back: ₹50 − ₹37 = ₹13. Check it the other way: ₹37 + ₹13 = ₹50.

  3. Question 3 · Maths

    Nikhil has ₹50. One notebook costs ₹7. What is the greatest number of notebooks Nikhil can buy?

    1. A.1
    2. B.7
    3. C.6
    4. D.49
    Show answer

    Answer: B. 7

    7 of them cost 7 × ₹7 = ₹49, which can be paid. One more would cost ₹56, which is more than ₹50. So the greatest number is 7, with ₹1 left over.

  4. Question 4 · Science

    Which group does the butterfly belong to?

    1. A.fish
    2. B.bird
    3. C.mammal
    4. D.insect
    Show answer

    Answer: D. insect

    The butterfly is an insect. It is often called a bird because it flies, but it has six legs and no feathers.

  5. Question 5 · Science

    Which force is at work when a magnet picks up a pin?

    1. A.magnetic force
    2. B.friction
    3. C.muscular force
    4. D.gravity
    Show answer

    Answer: A. magnetic force

    When a magnet picks up a pin, the force at work is magnetic force. It is often taken for gravity because gravity pulls the pin DOWN - this force lifts it UP against gravity.

  6. Question 6 · English

    My uncle gave ___ apple to my sister and ___.

    1. A.a ... I
    2. B.an ... me
    3. C.an ... I
    4. D.a ... me
    Show answer

    Answer: B. an ... me

    We say: My uncle gave an apple to my sister and me. Apple begins with a vowel sound, so an; and after 'to my sister and', the receiver is me, never I.

  7. Question 7 · English

    A ___ of ships sailed out to sea.

    1. A.Litter
    2. B.Flock
    3. C.Fleet
    4. D.Herd
    Show answer

    Answer: C. Fleet

    We say: A fleet of ships sailed out to sea. 'Herd' does not fit, because herd is for animals, not ships.

  8. Question 8 · Logical Reasoning

    What is Arjun's father's brother's son to Arjun?

    1. A.uncle
    2. B.nephew
    3. C.brother
    4. D.cousin
    Show answer

    Answer: D. cousin

    Your father's brother is your uncle, and your uncle's son is your cousin.

  9. Question 9 · Logical Reasoning

    How is Sara's daughter's daughter related to Sara?

    1. A.daughter
    2. B.granddaughter
    3. C.grandmother
    4. D.grandson
    Show answer

    Answer: B. granddaughter

    Take the chain one step at a time. Sara's daughter is one step down the family, and that person's daughter is another step down. So that person is Sara's granddaughter.

  10. Question 10 · Computers

    Amit tries to save a long film onto his computer, and a message tells him there is no room left to keep anything more. Everything else works normally. Which part of the computer is most likely causing this?

    1. A.Hard disk
    2. B.Monitor
    3. C.Printer
    4. D.Keyboard
    Show answer

    Answer: A. Hard disk

    The question says more about what is still going right than about what has gone wrong, and every one of those details crosses a part off the list. The one thing left unexplained is there being nowhere left to keep a file, and the hard disk is the only part on the list that could bring it about.

What the Class 3 SOF papers cover

As published by the Science Olympiad Foundation for Class 3.

SOF International Mathematics Olympiad

Achievers
Higher Order Thinking Questions - Syllabus as per Mathematical Reasoning
Everyday Mathematics
Syllabus as per Mathematical Reasoning Section
Logical Reasoning
Patterns, Analogy and Classification, Alphabet Test, Coding-Decoding, Ranking Test, Grouping of Figures and Figure Matrix, Mirror Images, Geometrical Shapes, Embedded Figures, Possible Combinations, Clock and Calendar
Mathematical Reasoning
Numerals, Number Names, Number Sense (4-digit numbers), Computation Operations, Fractions, Length, Weight, Capacity, Temperature, Time, Money, Geometry, Data Handling

SOF International Science Olympiad

Achievers
Higher Order Thinking Questions - Syllabus as per Science Section
Logical Reasoning
Patterns, Analogy and Classification, Alphabet Test, Coding-Decoding, Ranking Test, Grouping of Figures and Figure Matrix, Mirror Images, Geometrical Shapes, Embedded Figures, Possible Combinations, Clock and Calendar
Science
Plants and Animals, Birds, Food, Housing, Clothing and Occupation, Transport, Communication and Safety Rules, Human Body, Earth and Universe, Matter and Materials, Light, Sound and Force, Our Environment

SOF International English Olympiad

Achievers
Higher Order Thinking Questions
Reading
Search for and retrieve information from stories, poems, dialogues. Broad understanding and specific info from messages, notices, invitations
Spoken & Written Expression
Situation-based functional language understanding
Word & Structure Knowledge
Collocations, Spellings, Words related to Animals, Clothes, Professions etc, Synonyms, Antonyms, Analogies, Nouns, Pronouns, Verbs, Adverbs, Adjectives, Articles, Prepositions, Conjunctions, Contractions, Correct form of words, Simple tenses, Punctuation

SOF International Computer Science Olympiad

AI, Robotics and Information Technology
Introduction to AI, Robotics, IT Gadgets, Devices, Apps, Computerization, and other Developments in the Field of IT
Achievers
Higher Order Thinking Questions - Syllabus as per Sections 2 and 3.
Computer Science
Fundamentals of Computer, General Information about Computers, Storage Devices, MS-Paint, Introduction to Internet, Introduction to MS-Word, Latest Developments in the field of IT
IT & Achievers
IT Gadgets, Apps, Devices and HOT Questions
Logical Reasoning
Patterns, Analogy and Classification, Alphabet Test, Coding-Decoding, Ranking Test, Grouping of Figures and Figure Matrix, Mirror Images, Geometrical Shapes, Embedded Figures, Possible Combinations, Clock and Calendar

SOF International General Knowledge Olympiad

Achievers
Higher Order Thinking Questions from the above given Syllabus
Syllabus
Me and My Surroundings, Plants and Animals, India and the World, Science and Technology, Language and Literature, Earth and Its Environment, Transport and Communication, Sports, Maths Fun, Life Skills (Moral Values, Team Work, Environmental Sensitivity, Communication, Leadership, Time Management), Current Affairs and Developments

SOF International Social Studies Olympiad

Achievers
Higher Order Thinking Questions - Syllabus as per Section - 1
Social Studies
Basic Needs, Festivals and Celebrations, People Who Help Us, Solar System and Our Earth, Our Environment, India - Our Motherland, India - Our Heritage, Our Ancestors - Early Life and Civilisation, Connecting People

All 61 olympiads open to Class 3

Grouped by the body that runs them. Each links to its exam pattern, fee and full syllabus.

Science Olympiad Foundation

SilverZone Foundation

Centre for Research & Exams in Science & Technology

Unified Council

Indian Talent Olympiad

EduHeal Foundation

Hindustan Media Ventures

HummingBird Education

LogIQids (Techfest IIT Bombay partner)

National Olympiad Foundation

Unicus Olympiads

Questions parents ask about Class 3

Which olympiads can a Class 3 student take?
61 olympiads from 11 organising bodies admit Class 3, including the SOF International Mathematics Olympiad (IMO), the SOF International Science Olympiad (NSO, now ISO) and the SOF International English Olympiad (IEO). The full list, with exam windows, is on this page.
Is PrepMojo free for Class 3?
Yes. Every child gets 10 practice questions a day free, forever, with no card needed, plus one free mock paper every 60 days. PrepMojo Plus adds unlimited daily practice, unlimited SOF-pattern mock papers and 100 Mojo AI tutor doubts a month, from ₹299. Till 30 Nov 2026, every child has Plus at no cost as part of our Navratri and Diwali Offer.
How long is the Class 3 IMO paper?
The SOF IMO paper for Class 3 has 35 questions and runs for 60 minutes. Level 1 is held Oct-Dec.
Which subjects does PrepMojo cover for Class 3?
Maths, Science, English, Logical Reasoning and Computers, following the syllabus each olympiad's organising body publishes. Practice works in the app on iPhone and Android and in any web browser.