20 Olympiad Questions for Class 6 with Answers – Mixed Practice Test

Are you preparing for a Class 6 Olympiad?

A good Olympiad preparation strategy should include more than studying individual chapters. Students should also practise mixed questions that require them to switch between concepts, subjects and types of reasoning.

This Class 6 Olympiad practice test contains 20 original Mathematics, Science and Reasoning questions.

Try to solve the questions without looking at the answers.

Recommended approach: Give yourself around 20–25 minutes and record your score.

Note: Olympiad syllabi and examination patterns vary between organisers. Always check the official syllabus and pattern for the particular Olympiad you are preparing for.

Class 6 Olympiad Mixed Practice Test

Question 1 – Mathematics

What is the next number in the pattern?

3, 6, 12, 24, ?

A. 36
B. 42
C. 48
D. 54

Answer: C. 48

Explanation:

Each number is multiplied by 2:

3 × 2 = 6

6 × 2 = 12

12 × 2 = 24

Therefore:

24 × 2 = 48

Question 2 – Science

Which part of a plant mainly absorbs water and minerals from the soil?

A. Stem
B. Leaf
C. Root
D. Flower

Answer: C. Root

Explanation:

Roots absorb water and minerals from the soil and also help anchor the plant.

Question 3 – Reasoning

Find the odd one out.

A. Triangle
B. Square
C. Circle
D. Rectangle

Answer: C. Circle

Explanation:

A triangle, square and rectangle are polygons made up of straight line segments.

A circle has a curved boundary.

Question 4 – Mathematics

A box contains 48 chocolates. They are divided equally among 6 students.

How many chocolates does each student receive?

A. 6
B. 7
C. 8
D. 9

Answer: C. 8

Explanation:

48 ÷ 6 = 8

Question 5 – Science

Which of the following is a transparent material?

A. Wood
B. Clear glass
C. Cardboard
D. Stone

Answer: B. Clear glass

Explanation:

A transparent material allows most light to pass through it.

Question 6 – Mathematics

Which fraction is greater?

A. 3/5
B. 2/3
C. 1/2
D. 4/9

Answer: B. 2/3

Explanation:

Convert the fractions approximately:

3/5 = 0.60

2/3 ≈ 0.67

1/2 = 0.50

4/9 ≈ 0.44

Therefore, 2/3 is greatest.

Question 7 – Reasoning

If:

2 → 6

3 → 12

4 → 20

Then:

5 → ?

A. 25
B. 30
C. 35
D. 40

Answer: B. 30

Explanation:

The pattern is:

2 × 3 = 6

3 × 4 = 12

4 × 5 = 20

Therefore:

5 × 6 = 30

Question 8 – Science

Which gas is required by humans for respiration?

A. Carbon dioxide
B. Oxygen
C. Nitrogen
D. Hydrogen

Answer: B. Oxygen

Explanation:

Humans use oxygen during respiration.

Question 9 – Mathematics

A rectangle has a length of 15 cm and breadth of 5 cm.

What is its perimeter?

A. 20 cm
B. 30 cm
C. 40 cm
D. 75 cm

Answer: C. 40 cm

Explanation:

Perimeter of a rectangle:

2 × (Length + Breadth)

= 2 × (15 + 5)

= 2 × 20

= 40 cm

Question 10 – Science

Which of the following is an example of a reversible change?

A. Burning paper
B. Cooking food
C. Melting ice
D. Burning wood

Answer: C. Melting ice

Explanation:

Melted ice can be frozen again to form ice.

Therefore, melting ice is a reversible change.

Challenge Round

The next 10 questions require a little more thinking.

Question 11 – Mathematics

A number is divisible by both 2 and 5.

Which of the following could be the number?

A. 23
B. 35
C. 40
D. 47

Answer: C. 40

Explanation:

A number divisible by both 2 and 5 must be divisible by 10.

40 is divisible by 10.

Therefore, the answer is 40.

Question 12 – Reasoning

Complete the sequence:

AZ, BY, CX, DW, ?

A. EV
B. FU
C. EX
D. EW

Answer: A. EV

Explanation:

The first letters move forward:

A, B, C, D, E

The second letters move backward:

Z, Y, X, W, V

Therefore:

EV

Question 13 – Science

A wet cloth is placed under a fan.

Why is it likely to dry faster than a similar cloth kept in still air?

A. The fan produces water.

B. Moving air can increase evaporation.

C. The cloth absorbs air.

D. The fan reduces the amount of water in the cloth directly.

Answer: B. Moving air can increase evaporation.

Explanation:

Moving air can help water evaporate from the surface of the cloth more quickly.

Question 14 – Mathematics

Ravi has ₹200.

He buys a book for ₹125 and a pen for ₹25.

How much money is left?

A. ₹40
B. ₹45
C. ₹50
D. ₹55

Answer: C. ₹50

Explanation:

Total spent:

₹125 + ₹25 = ₹150

Money left:

₹200 − ₹150 = ₹50

Question 15 – Science

Consider this food chain:

Grass → Grasshopper → Frog → Snake

Which organism is the producer?

A. Grass
B. Grasshopper
C. Frog
D. Snake

Answer: A. Grass

Explanation:

Plants make their own food and are therefore called producers.

Question 16 – Reasoning

A clock shows 3:00.

What is the angle between the hour hand and the minute hand?

A. 45°
B. 60°
C. 90°
D. 180°

Answer: C. 90°

Explanation:

At 3:00, the minute hand points at 12 and the hour hand points at 3.

The angle between them is 90°.

Question 17 – Mathematics

A square has an area of 64 cm².

What is the length of one side?

A. 6 cm
B. 7 cm
C. 8 cm
D. 9 cm

Answer: C. 8 cm

Explanation:

Area of a square:

Side × Side

8 × 8 = 64

Therefore, the side is 8 cm.

Question 18 – Science

A student places an iron nail near a magnet.

What is most likely to happen?

A. The nail is attracted to the magnet.

B. The nail becomes transparent.

C. The nail melts immediately.

D. Nothing happens because iron is non-magnetic.

Answer: A. The nail is attracted to the magnet.

Explanation:

Iron is a magnetic material and is attracted to a magnet.

Question 19 – Mathematics

The ratio of boys to girls in a class is 2 : 3.

If there are 10 boys, how many girls are there?

A. 12
B. 15
C. 18
D. 20

Answer: B. 15

Explanation:

2 parts = 10 boys

1 part = 5

Girls = 3 parts

3 × 5 = 15

Question 20 – Olympiad Challenge

A two-digit number has digits whose sum is 9.

The tens digit is twice the units digit.

What is the number?

A. 36
B. 54
C. 63
D. 72

Answer: C. 63

Explanation:

Let the units digit be x.

Tens digit = 2x.

Therefore:

x + 2x = 9

3x = 9

x = 3

Tens digit = 6

Therefore, the number is 63.

Answer Key

Check Your Score

18–20 Correct — Olympiad Champion! 🏆

Excellent work!

You have demonstrated strong accuracy and problem-solving ability.

15–17 Correct — Very Good! ⭐

Your preparation is going well. Identify the questions you missed and practise those concepts again.

10–14 Correct — Good Start! 👍

You have a good foundation, but you should continue practising mixed and application-based questions.

Below 10 — Keep Practising! 💪

Don't be discouraged.

Go back to the basic concepts, practise topic-wise questions and then attempt this test again.

Remember:

A wrong answer is not a failure.

It is an opportunity to learn.

How to Use This Test Effectively

Don't simply check your score.

Create a small mistake analysis table:

After completing the test, identify whether your mistakes were related to:

• Concept

• Calculation

• Reading

• Reasoning

• Carelessness

• Time management

Then practise that area again.

Want More Class 6 Olympiad Practice?

If you enjoyed this mixed test, continue with our other Class 6 resources:

20 Maths Olympiad Questions for Class 6 with Answers

Practice Mathematics concepts, reasoning and problem-solving.

20 Science Olympiad Questions for Class 6 with Answers

Practise Science concepts, application-based questions and scientific reasoning.

You can also read:

How to Prepare for Olympiad Exams at Home

for a complete preparation strategy.

And:

Olympiad Exam Syllabus for Classes 1–12

to understand the topics you may need to prepare.

Final Challenge

Try this test again after one week.

Can you improve your score?

First attempt → Learn from mistakes → Practise → Second attempt → Improve

That's how Olympiad preparation becomes stronger.

At Olympiad Digital, our goal is to provide useful Olympiad questions, preparation guides, practice resources and books for students from Classes 1–12.

📚 Learn. Practise. Think. Improve.