SOF IMO for Class 1

IMO Class 1 at a glance

Conducted by

Science Olympiad Foundation

Questions for Class 1

35

Duration

60 min

Total marks

40

Fee

₹150-200

Exam window

Oct-Dec (L1); Feb (L2)

Levels

2 (Level 2 for Class 3-12)

Classes eligible

1-12

Level 1 is held in Oct-Dec and Level 2 in Feb. Each school picks its exam day inside the window; the date for your child comes from the school. Confirm on sofworld.org.

Exam pattern for Class 1

35 questions for 40 marks, 60 minutes, all multiple choice. No negative marking.

Ties are broken by section, in this order: Achievers > Everyday Maths > Mathematical Reasoning > Reasoning (M4,M2,M3,M1).

Try 8 real Class 1 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

   Read all four statements. Which one is NOT correct?

   1. A.A triangle has three corners.
   2. B.A rectangle has three sides.
   3. C.A triangle has three sides.
   4. D.A rectangle has four corners.
   Show answer

   Answer: B. A rectangle has three sides.

   Take the statements one at a time and check each against the shape it names. A rectangle is closed by four straight sides. Three straight sides make a triangle.

2. Question 2 · Maths

   Boxes hold 7, 11, 15, ?, 23, 27 squares. How many squares are hidden?

   1. A.16 squares
   2. B.19 squares
   3. C.18 squares
   4. D.8 squares
   Show answer

   Answer: B. 19 squares

   Work out the jump first: 7 to 11 to 15 goes up by 4 each time. So add 4 to 15 to fill the empty box, and check it by taking 4 away from 23 - both give the same number.

3. Question 3 · Maths

   Vihaan has 14 marbles. Each bag holds 5 marbles. How many more marbles are needed to fill one more bag?

   1. A.5
   2. B.4
   3. C.2
   4. D.1
   Show answer

   Answer: D. 1

   Taking away 5 marbles at a time fills 2 bags and leaves 4 over. A full bag needs 5, so 5 − 4 = 1 more would fill one.

4. Question 4 · Maths

   Tara is 7th from the top and 3rd from the bottom in the running race. How many runners are there altogether?

   1. A.8
   2. B.13
   3. C.4
   4. D.9
   Show answer

   Answer: D. 9

   Adding the two places gives 7 + 3 = 10, but that counts Tara twice, once from each end. Taking the one extra away leaves 9.

5. Question 5 · Maths

   Devika is 3rd from the top and 7th from the bottom in the queue for tickets. How many people are there altogether?

   1. A.8
   2. B.9
   3. C.4
   4. D.7
   Show answer

   Answer: B. 9

   Adding the two places gives 3 + 7 = 10, but that counts Devika twice, once from each end. Taking the one extra away leaves 9.

6. Question 6 · Maths

   Arjun, Vikram and Neha sit in a row. Neha is next to Arjun. Neha is at the right end. Left to right, the row is:

   1. A.Neha, Arjun, Vikram
   2. B.Arjun, Neha, Vikram
   3. C.Arjun, Vikram, Neha
   4. D.Vikram, Arjun, Neha
   Show answer

   Answer: D. Vikram, Arjun, Neha

   Start with the end clue: Neha is at the right end. Then place the others so that every clue holds. Only one row fits all the clues. From left to right it is Vikram, Arjun, Neha.

7. Question 7 · Logical Reasoning

   Which one is the odd one out?

   1. A.Pilot
   2. B.Ferry
   3. C.Helicopter
   4. D.Bicycle
   Show answer

   Answer: A. Pilot

   Pilot belongs with people who do jobs; all the other words are ways to travel.

8. Question 8 · Logical Reasoning

   The letters of RAINBOW stand in a line. What place is O from the right?

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

   Answer: D. 2

   Count the letters first: RAINBOW has 7 of them, and O is letter 6 counting from the left. Place from the right = 7 − 6 + 1 = 2. The +1 is because the letter itself is counted too.

SOF IMO Class 1 syllabus

As published by SOF for Class 1: 4 sections, 21 topics. Reproduced as printed, so what you read here is what the paper is set from.

Compiled from sofolympiadtrainer.com. Always confirm against the official site before an exam.

Questions parents ask about IMO Class 1

What is the SOF IMO syllabus for Class 1?

The Class 1 paper has 4 sections: Logical Reasoning, Mathematical Reasoning, Everyday Mathematics, Achievers. Topics include Patterns, Odd One Out, Measuring Units, Geometrical Shapes, Spatial Understanding, Grouping of Figures, Analogy, Ranking Test, Problems based on Figures, Numerals. The full list of 21 topics, as SOF publishes it, is on this page.

How many questions are in the Class 1 IMO paper?

35 questions for 40 marks, in 60 minutes. Logical Reasoning: 10 questions of 1 mark each; Mathematical Reasoning: 10 questions of 1 mark each; Everyday Mathematics: 10 questions of 1 mark each; Achievers Section: 5 questions of 2 marks each. There is no negative marking.

When is the SOF IMO exam for Class 1 in 2026-27?

Level 1 is held in Oct-Dec and Level 2 in Feb. Each school picks its own exam day inside that window and tells its students, so the date for your child comes from the school. Confirm it on the official SOF site before the exam.

Where can a Class 1 child practise IMO questions for free?

On PrepMojo. Every child gets 10 practice questions a day free, forever, with no card needed, and every answer comes with an explanation. It works in the app on iPhone and Android and in any web browser. Till 30 Nov 2026, every child has PrepMojo Plus at no cost as part of our Navratri and Diwali Offer.