Olympiad practice for Class 4

Try 10 real Class 4 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

   Anika left the office at 2:00 p.m. for a 2-hour seminar. The drive took 1 h 30 min, and Anika reached the hall 20 minutes after the seminar had started. At what time did the seminar end?

   1. A.5:10 p.m.
   2. B.3:30 p.m.
   3. C.5:30 p.m.
   4. D.5:50 p.m.
   Show answer

   Answer: A. 5:10 p.m.

   Going forward first, 2:00 p.m. plus 1 h 30 min reaches 3:30 p.m. Arriving 20 minutes LATE means the seminar had begun 20 minutes earlier, so go backwards from 3:30 p.m. to 3:10 p.m. Then run forward again for the 2 hours it lasted, which reaches 5:10 p.m.

2. Question 2 · Maths

   A rectangle is 12 cm long and 2 cm wide. What is its perimeter, in cm?

   1. A.28
   2. B.48
   3. C.24
   4. D.14
   Show answer

   Answer: A. 28

   Perimeter is the distance all the way round: 12 + 2 + 12 + 2 = 28 cm. It is 2 × (12 + 2), not 12 × 2 - that would be the area, which measures the space inside.

3. Question 3 · Maths

   Diya puts aside 2675 paise each month. How much money is that altogether in 14 months?

   1. A.₹401 and 25 paise
   2. B.₹37450
   3. C.₹3745
   4. D.₹374 and 50 paise
   Show answer

   Answer: D. ₹374 and 50 paise

   Multiply in paise first: 2675 × 14 = 37450 paise. A hundred paise make one rupee, so divide by a hundred to write it in rupees.

4. Question 4 · Science

   A heavy box is dragged up to the same shelf along three ramps of different lengths. Along which ramp is the smallest force needed?

   1. A.The same force along all three
   2. B.The longest ramp
   3. C.Whichever ramp is widest
   4. D.The middle ramp
   Show answer

   Answer: B. The longest ramp

   A longer ramp spreads the same climb over a greater distance, so each step of the journey lifts the box a little less and needs a smaller pull.

5. Question 5 · Science

   Select the odd one out on the basis of the covering on the body.

   1. A.Lizard
   2. B.Crocodile
   3. C.Pigeon
   4. D.Rohu fish
   Show answer

   Answer: C. Pigeon

   A pigeon's body is covered with feathers. Rohu fish, Lizard and Crocodile all agree on the basis named in the question, so the one that does not is the odd one out.

6. Question 6 · English

   Choose the option that best completes the analogy. Brave : Courageous :: Smart : ____________

   1. A.Confident
   2. B.Curious
   3. C.Honest
   4. D.Clever
   Show answer

   Answer: D. Clever

   'Clever' correctly completes the analogy. 'Confident' is often guessed instead, because 'confident' is a general self-belief, a different quality from being smart.

7. Question 7 · English

   Someone says: "How short would you like it at the back?" Who is speaking?

   1. A.A barber
   2. B.A bus conductor
   3. C.A doctor
   4. D.A shopkeeper
   Show answer

   Answer: A. A barber

   'How short would you like it at the back?' is said by a barber - not a doctor, because a doctor may look at your head but never cuts your hair.

8. Question 8 · Logical Reasoning

   If doctor is called teacher, teacher is called farmer, farmer is called pilot and pilot is called doctor, then who grows our food?

   1. A.farmer
   2. B.pilot
   3. C.doctor
   4. D.teacher
   Show answer

   Answer: B. pilot

   Answer the question first, then translate. The true answer is farmer. But nothing here keeps its own name: farmer is called pilot, so pilot is what you say. Reading the swap the other way round - asking what is called farmer - answers a question nobody asked.

9. Question 9 · Logical Reasoning

   Each letter of the word ENVIRONMENT may be used only as often as it appears in it. Which of the following words CANNOT be formed from its letters?

   1. A.MENTOR
   2. B.INTERN
   3. C.INVENT
   4. D.MONITOR
   Show answer

   Answer: D. MONITOR

   Strike the letters of each option off ENVIRONMENT one at a time. The answer runs out at the letter O, which ENVIRONMENT does not supply often enough, while the other three can be built completely.

10. Question 10 · Computers

    Which one of these uses artificial intelligence?

    1. A.A torch that switches on with a button
    2. B.Traffic lights that change on a fixed timer
    3. C.An app that suggests videos you might like
    4. D.A washing machine running on a timer
    Show answer

    Answer: C. An app that suggests videos you might like

    An app that suggests videos you might like uses AI: it learns from what you and others have watched before. A torch that switches on with a button is often thought to use AI because it is an electronic gadget, but being electronic is not the same as being intelligent. Suggesting is a prediction, not a rule someone wrote out in advance.

What the Class 4 SOF papers cover

As published by the Science Olympiad Foundation for Class 4.

All 61 olympiads open to Class 4

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

Questions parents ask about Class 4

Which olympiads can a Class 4 student take?

61 olympiads from 11 organising bodies admit Class 4, 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 4?

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 4 IMO paper?

The SOF IMO paper for Class 4 has 35 questions and runs for 60 minutes. Level 1 is held Oct-Dec.

Which subjects does PrepMojo cover for Class 4?

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.