The IEO (International English Olympiad) Test is a top English test worldwide. It's held each year by the Science Olympiad Foundation (SOF) in partnership with the British Council. It checks how well students know English, both in reading and writing, as well as in talking to others. Taking part in the IEO can make students better at English. It also opens doors for them to do well in school and in their future jobs. Plus, winning in the IEO can help students stand out around the globe. Practice with the free IEO - International English Olympiad practice test on PracticeTestGeeks (150+ questions with answer explanations).

Candidates preparing for usabo can build exam confidence with our USABO biology practice test 2026, which covers all key topics and question formats used in the real assessment.

IEO Exam at a Glance

What changed for IEO in 2026

• Oct 29, 2026: Eligibility (Level 2) changed to Top 5% per class, top 25 per zone per class, and school class toppers (previously Classes 3-12; top 5% class-wise, top 25 per zone, school toppers).^[4]
• Oct 29, 2026: Delivery (Level 1) changed to At the student's own school during school hours (previously Paper-based (offline), at the student's own school during school hours).^[1]
• Oct 29, 2026: Eligibility (Level 1) changed to Classes 1-12; school registration (previously Classes 1-12 at an SOF-recognized school; registration through the school only).^[1]
• Oct 29, 2026: Exam fee changed to INR 170 per student (India, Bhutan, Nepal); US$11 elsewhere (previously INR 170 per student per Olympiad (India, Bhutan, Nepal; incl. GST); US$11 in other countries).^[2]
• Oct 29, 2026: Number of questions (Level 1 – Classes 1-4) changed to 35 questions (40 marks) (previously 35 multiple-choice questions (40 marks)).^[3]
• Oct 29, 2026: Number of questions (Level 1 – Classes 5-12) changed to 50 questions (60 marks) (previously 50 multiple-choice questions (60 marks)).^[3]
• Oct 29, 2026: Registration deadline changed to Usually 30 days before the exam, via the school (previously Usually 30 days before the chosen exam date, through the school).^[4]
• Oct 29, 2026: Retake policy changed to Can sit again to improve previous rankings (previously Can be taken again each year in a higher class).^[4]

Free IEO - International English Olympiad Study Tools

Interactive IEO - International English Olympiad resources on PracticeTestGeeks, free to start:

• Free International English Olympiad Basic Questions and Answers — 11 questions with instant scoring and answer explanations
• IEO - International English Olympiad flashcards — review key terms and concepts card by card
• IEO - International English Olympiad study guide — topic-by-topic overview of what the exam covers
• IEO - International English Olympiad cheat sheet — one-page printable summary for last-minute review

According to Science Olympiad Foundation, “For classes 1st to 4th , there are 35 questions worth a total of 40 marks , while for classes 5th to 12th , there are 50 questions worth a total of 60 marks .”^[3]

Worked examples: how to reason through IEO questions

These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.

Example 1

Question: What does the phrase 'hit the sack' mean?

1. To punch a punching bag
2. To go to bed or sleep
3. To win a fight
4. To finish work quickly

Answer: B. To go to bed or sleep

Explanation:

The correct answer is B. 'Hit the sack' is an informal idiom meaning to go to bed or to sleep. The word 'sack' stands for a bed, and 'hit' here means to get into it, not to strike it.

Option A is the literal reading, which is the trap in this question. Nobody is hitting a punching bag. Option C borrows the idea of hitting from fighting idioms, but nothing in the phrase is about a contest. Option D mixes it up with phrases about finishing a task, such as 'wrap up', and has no link to the words used.

The rule to remember: an idiom's meaning does not come from adding up its words. When an option sounds like a picture of the words, be suspicious of it. Read the whole sentence for context, and learn idioms as complete units, not as separate words.

Example 2

Question: Choose the grammatically correct sentence:

1. She is more smarter than her sister.
2. She is smarter than her sister.
3. She is most smart than her sister.
4. She is more smart than her sister.

Answer: B. She is smarter than her sister.

Explanation:

The correct answer is B, 'She is smarter than her sister.' Short adjectives such as smart, tall and fast form the comparative by adding '-er', and the word 'than' then introduces the thing being compared.

Option A, 'more smarter', is a double comparative. The '-er' ending and the word 'more' both do the same job, so one of them is extra. Option C uses 'most', which is a superlative marker, and a superlative does not fit with 'than'. Option D, 'more smart', uses the long-adjective pattern for an adjective that already takes '-er'.

The rule to remember: use '-er' or 'more', never both. Short adjectives usually take '-er', longer ones usually take 'more', and 'most' belongs in comparisons of three or more things, not with 'than'.

Example 3

Question: Which sentence contains a SPELLING error?

1. She gave a sincere apology.
2. The principle of the school arrived.
3. The experiment yielded interesting results.
4. Her behavior was exemplary.

Answer: B. The principle of the school arrived.

Explanation:

The correct answer is B. 'The principle of the school arrived' uses the wrong word. 'Principle' means a basic rule or truth. The head of a school is the 'principal', so the sentence needs that spelling.

Option A is correct: 'sincere' and 'apology' are both spelled properly. Option C is correct: 'experiment' and 'yielded' are both spelled properly, and 'yielded' follows the usual rule of 'i' before 'e' after 'y'. Option D is correct: 'behavior' is the American spelling, and 'behaviour' is the British one, but neither is an error in meaning, and 'exemplary' is spelled properly.

The rule to remember: principal can be a person or mean 'main', and principle is always an idea or rule. A helpful memory aid is that a principal is your pal.

How to use these practice tests

Start with the official material. Read the Science Olympiad Foundation page on how to participate and check the current dates, fee and registration process with your school. That tells you what the exam looks like before you practise.

Next, take a short sample from several of our sets to find your weak areas. A good first pass is Grammar and Sentence Correction, Vocabulary and Word Meanings and Reading Comprehension. Note which questions you got wrong and why, rather than only counting your score.

Then work on the weak areas in short, regular sessions. Use Idioms and Phrases or Spelling and Word Formation for word-level gaps, and Tenses and Parts of Speech for grammar. After each set, read the explanation for every option, including the ones you got right.

Close to the exam, practise under time. Level 1 runs for 60 minutes, so answer a full set in a single sitting and then review your errors. Our questions are written by us, are not real exam questions, and are made with AI tools, so use them for practice only and not as a prediction of what will appear.

Key Takeaways:

• The IEO (International English Olympiad) Test is a globally recognized English language competition organized by the Science Olympiad Foundation.
• The exam assesses students' English proficiency, including reading, writing, and communication skills.
• Participation in the IEO helps students enhance their linguistic abilities and opens up opportunities for international recognition and scholarships.
• The IEO is conducted in two levels - Level 1 for classes 1 to 12 and Level 2 for classes 3 to 12.
• Students can compete in the IEO at various levels, including school, city, zonal, and international.

What is the IEO?

Understanding the IEO (International English Olympiad) Test

The IEO (International English Olympiad) is a worldwide English competition. It tests and celebrates students' English skills. It's held every year to encourage a passion for English and to see how well it's taught globally.

The IEO is a big test that checks how well students know English. It looks at grammar, vocabulary, and how good you are at understanding what you read. Doing well can bring you local and global recognition. It also opens up opportunities in school and for jobs for top students.

IEO Exam Pattern and Structure

There are two levels in the IEO. Only the best 5% from the first level can move to the second level. Here's how the exam is set:

1. Level 1: It tests basic grammar, vocabulary, and reading. You'll need to know about parts of speech, tenses, and how to read and understand texts.
2. Level 2: For those who did well in Level 1, this part is harder. It has more complex grammar, vocabulary, and reading tasks.

Doing well in the IEO can really propel you forward. It's not just about winning a competition. Better English leads to better school performance and more chances in the job market later on.

Olympiad Genius Resources

Preparation Strategies for the IEO

To get ready for the IEO test, students need a solid plan. They should start by learning what the test covers. Knowing this helps to find out what they are good at and areas that need work. Then, it's time to make a study schedule. This should include time for regular schoolwork and IEO prep.

Olympiad Genius is a great help for students. It offers the "Achiever's Package" for the IEO. This package has study materials and test papers from classes 1 to 8. It is a perfect way for students to get the hang of the test setup and practise their skills.

Grammar practice is key, says Olympiad Genius. The IEO test has questions about tricky grammar and special words. Their resources can really strengthen a student's English skills. This is very important for doing well on the IEO.

Using old test papers is another smart tip from Olympiad Genius. This lets students see the kind of questions they will face. It gets them ready and confident for the test day.

Only the top 5% go on to the IEO's second round. So, a carefully planned study strategy is a must. With the help of Olympiad Genius and a good study plan, students can aim for top marks in the IEO.

Sample IEO - International English Olympiad Practice Questions

Try these questions from our free IEO - International English Olympiad practice tests. The correct answer and an explanation follow each question.

1. This history test is so difficult as I think I'm going to fail.

   • A. This history test is so difficult
   • B. as I think
   • C. I'm going to fail
   • D. No error

   Answer: B. as I think

   The error is 'as I think' because 'so' requires the conjunction 'that' to complete the result clause — the correct phrasing is 'so difficult that I think I'm going to fail.' Using 'as' breaks the required 'so...that' correlative structure in English.

2. Which word should be capitalized in the sentence: 'my favorite subject is english'?

   • A. My and subject
   • B. My, English, and favorite
   • C. My and English
   • D. Only the first word

   Answer: C. My and English

   Both 'My' (first word of the sentence) and 'English' (a proper noun — a language name) must be capitalized.

3. Read: 'The doctor frowned after reviewing the test results.' What might this suggest?

   • A. The doctor was satisfied with the results.
   • B. The results were positive and encouraging.
   • C. The doctor was concerned or troubled by the results.
   • D. The doctor was unfamiliar with the test.

   Answer: C. The doctor was concerned or troubled by the results.

   Frowning typically signals concern, displeasure, or worry. In a medical context, this suggests the results were troubling.

4. What is the verb in the following sentence. I set the glass on the table.

   • A. Glass
   • B. Set
   • C. On
   • D. Table

   Answer: B. Set

   The verb in the given sentence is "set". It is the action word that describes what the subject "I" is doing. In this case, "I" is performing the action of setting the glass on the table.

Take the full IEO - International English Olympiad practice test

Sources & last verified

1. Science Olympiad Foundation — time limit, delivery, eligibility (official source). “The level 1 competition is a test of 60 minutes duration comprising 35 objective-type (Multiple Choice) questions for class 1 to class 4 and 50…” Verified Oct 29, 2026 · source checked Oct 22, 2026.
2. Science Olympiad Foundation — exam fee (official source). “Schools in India, Bhutan, and Nepal are required to remit a registration fee of INR 170 per student per Olympiad (inclusive of GST) to the…” Verified Oct 29, 2026 · source checked Oct 22, 2026.
3. Science Olympiad Foundation — number of questions (official source). “For classes 1st to 4th , there are 35 questions worth a total of 40 marks , while for classes 5th to 12th , there…” Verified Oct 29, 2026 · source checked Oct 22, 2026.
4. Science Olympiad Foundation — retake policy, eligibility, score release, registration deadline (official source). “Certainly. This will give you an opportunity to improve your previous rankings, and if you are successful in doing so, you will again be eligible…” Verified Oct 29, 2026 · source checked Oct 22, 2026.
5. Science Olympiad Foundation — next exam date (official source). “DATE ONE – 30 th September 2026 DATE TWO – 27 th October 2026 DATE THREE – 17 th November 2026” Verified Oct 30, 2026 · source checked Oct 30, 2026.

How we verify: editorial & fact-checking policy. Report an error: contact us.