Thailand has an exciting range of Maths, Science and informatics learning—but not every event called an Olympiad has the same organiser or purpose. Families might encounter POSN training camps, the Thailand Mathematical Olympiad, the Thailand International Mathematical Olympiad, the official national-team International Mathematical Olympiad or School Connect Olympiad. They are different pathways. This guide explains the genuine options, verified places to find official resources and twenty original worked problems suitable for developing students. School Connect also provides free chapter-wise learning materials, linked educational videos and practice questions that are continually updated and improved.

Compare the major Maths and Science Olympiad routes in Thailand

When considering an Olympiad, identify whether it is a normal classroom resource, a separate school-level contest, a national selection examination or an international team final. This determines the school stages, timing, preparation and entry requirements. A name containing ‘International Maths Olympiad’ does not automatically refer to the official national-team event.

Route	How it works	Reliable source
POSN academic Olympiads	Thailand’s specialised subject training, centre selection, camps and national competitions.	POSN
Thailand Mathematical Olympiad (TMO)	Thailand’s national-level Maths contest as described in POSN’s official archives.	POSN exams
Official International Mathematical Olympiad (IMO)	Six-student national teams and separate country selection; not direct public online enrolment.	Official IMO
Thailand International Mathematical Olympiad (TIMO)	A separately organised school-level maths competition, not national POSN TMO or the official IMO.	TIMO site
School Connect Olympiad (SCO)	Independent school-level programmes, plus free chapter-wise materials, linked educational videos and practice questions.	SCO study directory

The official International Mathematical Olympiad involves selected national teams, while SCO’s similarly named subject activity is an independent school programme. Do not assume that a private contest result leads to national-team qualification. If preparing for a particular local event, always consult that organiser’s current subject and year rules.

The POSN training and national-selection pathway

The POSN Foundation supports high-school talent in advanced Maths, Science and Computer Science. Its core programme uses regional and Bangkok centres for Mathematics, Computer Science, Chemistry, Biology and Physics. The published pathway is structured: local selection, training camps, national competitions and, for some successful candidates, further preparation for international representation.

Typical stage	POSN’s general outline	What a family must confirm
Subject and centre selection	Identify the eligible province, school, age and subject.	Find the responsible centre using the official centres directory.
Applications	Commonly around July.	The current year and centre-specific notice, documents, and exact deadline.
Selection tests	Commonly August; results around September.	Actual dates, venue, test language and permitted equipment.
Camp 1	Usually October for selected learners.	Whether the student’s selection result authorises participation.
Camp 2	Usually March for progressing participants.	Camp 1 performance, subject and attendance requirements.
National competition and further team selection	Dates depend on subject and host centre.	Official invitation and any later IPST training or national-team selection process.

The schedule above is an overview, not a confirmed new registration window for October 2026 or 2027. Some centres and subjects may have their own notices. National-team competition cannot be entered merely by paying a school-level online contest fee.

What subjects appear in the Thai official archives?

POSN’s official examination archive separates camp-selection papers, national contests and representative-selection papers. It covers the five core subjects and additional areas including astronomy, geography, Earth science and linguistics. The archive provides a more trustworthy starting point than an undated list of generic international competitions claiming everyone is eligible.

Interest	Good entry-level activity	Advanced source to explore later
Mathematics	Number patterns, fractions, shapes, ratios and writing a complete solution.	POSN mathematics selection and Thailand Mathematical Olympiad questions.
Physics	Distance and time, measurement, basic forces and fair observations.	POSN Physics selection and national competition papers.
Chemistry and Biology	Matter, safe observations, plant systems, evidence and simple data.	Specialised subject tests in the POSN archive.
Informatics	Patterns, clear instructions, loops, simple algorithms and debugging.	POSN Informatics and TOI National Grader.
Astronomy and Earth Science	The sky, models, diagrams, seasons and careful observation.	POSN astronomy and related subject papers when suitable.

Not every learner needs a national archive paper. Some POSN selection problems are demanding secondary-level tasks. A Prathom child may benefit more from learning place value, drawing triangles or writing simple instructions before attempting formal Olympiad problems.

Thailand’s verified 2026 official IMO results

In the 2026 official International Mathematical Olympiad, Thailand sent six contestants. The official individual results record one gold, one silver and four bronze medals. The awards were earned by those selected team members; they should never be advertised as guaranteed outcomes of separate online practice, school registration or a local camp.

Official international Maths team preparation often requires sophisticated problem-solving in number theory, combinatorics, geometry and algebra. Younger learners can still enjoy a meaningful starting point with grade-appropriate chapter resources. The path from curiosity to advanced competition should be gradual, not dependent on an expensive or unverified service.

How TIMO and SCO differ from POSN and the official IMO

The Thailand International Mathematical Olympiad (TIMO) operates as a separately organised mathematics competition. It describes school-level Maths interests such as geometry, logical thinking and arithmetic. This is different from the POSN national Thailand Mathematical Olympiad and the selected-team official IMO. Do not copy past TIMO dates, age conditions or fees into a new-year registration decision; check the organiser’s current announcement.

School Connect Olympiad offers free access to chapter-wise learning materials, linked educational videos and practice questions. These teaching resources are continually updated and improved, so students can learn without purchasing a learning plan. An optional SCO subject examination is a separate activity, with its own grade, country, exam fee and schedule considerations.

Our companion Thailand parent preparation and registration guide gives detailed Prathom/Mathayom mapping and a parent checklist for an independent SCO examination. This article has a different focus: which Thai Olympiad organisations are real, what their pathways mean, and how to begin learning now.

Trusted free learning and official Thai education sources

The Thai Institute for the Promotion of Teaching Science and Technology (IPST) supports Maths, Science and Technology learning. Its SciMath platform provides free Thai-language educational media, including videos, experiments, lesson plans and interactive activities. These can complement schoolwork and build understanding before a student chooses a specialised challenge.

• IPST SciMath — Thai Maths, Science and Technology learning videos and activities.
• My IPST — materials linked to Thai textbooks and grade levels.
• POSN examination archives — genuine selection, national competition and team-selection past papers.
• POSN centres directory — find the centre and subject relevant to your province.
• TOI National Grader — advanced informatics problem practice.
• Official IMO Thailand profile — verified team mathematics history.
• SCO free class-wise resources — chapter materials, linked videos and practice questions.
• SCO free study guide — practise with chapters, questions, samples and explanatory answers.

Five mini-lessons to start solving problems

1. Primary Maths: make a useful round number

Thirteen paper circles and eight more become twenty-one. Split eight into seven and one: 13+7 makes 20, then add one. The same approach helps with sums such as 16+7. Explain the split rather than memorising a trick.

Try next: Try 16+7 by making 20. Show the split of seven as four and three.

2. Shapes: perimeter is not area

For a 13 cm by 8 cm rectangle, adding around the four edges gives 13+8+13+8=42 cm. Multiplication would give area in square centimetres, which answers a different question. Draw the boundary before choosing an operation.

Try next: Sketch two different rectangles with perimeter 20 cm and compare their areas.

3. Science: design a fair comparison

If two similar seedlings receive different amounts of light, compare their growth while keeping water, soil and plant type as alike as practical. Measure at consistent times and write down observations. Use safe, supervised plants instead of hazardous experiments.

Try next: Make a chart for day, plant height and light condition. What could cause a misleading result?

4. Secondary algebra: check by substituting

To solve 5x−7=28, add seven and divide by five, giving x=7. Check by substituting: 5×7−7=28. Writing a check catches simple copying and arithmetic mistakes.

Try next: Invent a new equation with solution x=6 and ask a friend to solve it.

5. Informatics: follow a short algorithm

An algorithm starts at zero and adds 1, 2, 3 and 4. Its running totals are 1, 3, 6 and 10. Tracing each update builds the same careful thinking later needed in programming problems.

Try next: Write instructions for adding integers one through five and trace every change.

20 original Maths, Science, English and Informatics practice questions

The following twenty questions and worked solutions were written for this guide. They are not official POSN, TMO, TIMO, IMO or SCO exam questions. The suggested Prathom and Mathayom grades describe approximate learning difficulty; they are not an official competition syllabus or grade equivalence guarantee.

Question 1 (Prathom 1 · adding). A class draws 13 circles and adds eight more. How many circles are there?

A. 21   |   B. 20   |   C. 22   |   D. 23

Answer: A — 21. 13 + 8 = 21. Add seven to make 20, then one more.

Question 2 (Prathom 2 · subtracting). A group has 65 paper stars and uses 28. How many remain?

A. 47   |   B. 37   |   C. 43   |   D. 93

Answer: B — 37. 65 − 28 = 37. Subtract 20, then eight; check by adding 37 + 28 = 65.

Question 3 (Prathom 3 · equal groups). Seven trays have eight counters each. How many counters are there?

A. 15   |   B. 48   |   C. 56   |   D. 64

Answer: C — 56. Seven equal groups of eight make 7 × 8 = 56.

Question 4 (Prathom 4 · sharing). Forty-eight cards are placed in six equal sets. How many cards in each set?

A. 6   |   B. 7   |   C. 9   |   D. 8

Answer: D — 8. 48 ÷ 6 = 8. Check six sets of eight gives 48 cards.

Question 5 (Prathom 5 · geometry). A rectangle is 13 cm long and eight cm wide. Find its perimeter.

A. 42 cm   |   B. 104 cm   |   C. 21 cm   |   D. 34 cm

Answer: A — 42 cm. Perimeter is the boundary: 13 + 8 + 13 + 8 = 42 cm.

Question 6 (Prathom 6 · fractions). What is three-eighths of 64?

A. 16   |   B. 24   |   C. 32   |   D. 40

Answer: B — 24. One-eighth is eight. Three-eighths is 3 × 8 = 24.

Secondary Maths questions

Question 7 (Mathayom 1 · algebra). Solve 5x − 7 = 28.

A. 5   |   B. 6   |   C. 7   |   D. 9

Answer: C — 7. Add seven to obtain 5x = 35. Dividing by five gives x = 7.

Question 8 (Mathayom 2 · ratio). Red and blue tiles are in a 4:5 ratio, 63 tiles total. How many are blue?

A. 28   |   B. 30   |   C. 32   |   D. 35

Answer: D — 35. Nine equal parts total 63; each part is seven. Blue has five parts = 35.

Question 9 (Mathayom 3 · right triangles). A right triangle has perpendicular sides five and 12 cm. Find the hypotenuse.

A. 13 cm   |   B. 17 cm   |   C. 10 cm   |   D. 7 cm

Answer: A — 13 cm. Using Pythagoras, c² = 25 + 144 = 169, hence c = 13.

Question 10 (Mathayom 4 · probability). Two fair coins are tossed. Probability of getting exactly one head?

A. 1/4   |   B. 1/2   |   C. 1/3   |   D. 3/4

Answer: B — 1/2. Among HH, HT, TH and TT, exactly one head occurs twice: 2/4 = 1/2.

Question 11 (Mathayom 5 · arithmetic sequence). A sequence is 6, 10, 14, 18, … . What is its 20th term?

A. 76   |   B. 78   |   C. 82   |   D. 86

Answer: C — 82. The common difference is four. T20 = 6 + 19 × 4 = 82.

Question 12 (Mathayom 6 · differentiation). For f(x) = x³ − 4x, what is f′(3)?

A. 19   |   B. 21   |   C. 25   |   D. 23

Answer: D — 23. Differentiate to 3x² − 4, then substitute three: 27 − 4 = 23.

Science reasoning

Question 13 (Prathom 3 · plants). Which plant part usually absorbs water from soil?

A. Roots   |   B. Petals   |   C. Fruit   |   D. Flowers

Answer: A — Roots. Roots absorb water and anchor a plant.

Question 14 (Prathom 4 · matter). When liquid water becomes water vapour, what is this called?

A. Condensation   |   B. Evaporation   |   C. Freezing   |   D. Melting

Answer: B — Evaporation. Evaporation changes surface liquid water into vapour.

Question 15 (Prathom 5 · fair tests). If comparing the effect of light on seedlings, what should stay alike?

A. Only the pots   |   B. Nothing   |   C. Soil, plant type and water   |   D. All conditions must change

Answer: C — Soil, plant type and water. Vary the light and keep important other conditions as similar as possible.

Question 16 (Mathayom 1 · motion). A toy car travels 180 metres in 30 seconds at constant speed. What speed?

A. 3 m/s   |   B. 4 m/s   |   C. 5 m/s   |   D. 6 m/s

Answer: D — 6 m/s. Speed is distance over time: 180 ÷ 30 = 6 metres/second.

Question 17 (Mathayom 3 · density). Mass 180 g and volume 60 cm³. What is the object’s density?

A. 3 g/cm³   |   B. 6 g/cm³   |   C. 9 g/cm³   |   D. 0.33 g/cm³

Answer: A — 3 g/cm³. 180 ÷ 60 = 3 grams per cubic centimetre.

English and coding reasoning

Question 18 (Prathom 4 · English). Which sentence is grammatically correct?

A. They is studying.   |   B. They are studying.   |   C. They study yesterday.   |   D. They has study.

Answer: B — They are studying.. Plural ‘they’ correctly takes ‘are studying’.

Question 19 (Mathayom 1 · coding). An algorithm sums all integers from one through four. Find the total.

A. 4   |   B. 6   |   C. 10   |   D. 12

Answer: C — 10. Track running totals 1, 3, 6 and 10. The final sum is 10.

Question 20 (Mathayom 2 · reasoning). The pattern is 3, 7, 15, 31, … . What comes next?

A. 60   |   B. 61   |   C. 62   |   D. 63

Answer: D — 63. Double the previous term and add one. 31 × 2 + 1 = 63.

A four-week practice plan that fits schoolwork

Week	Learning priority	Low-pressure learning activity
1 — Understand	Choose a class-suitable Maths or Science topic.	Use a free SCO chapter, linked video and a few practice questions; explain the idea out loud.
2 — Apply	Try diagrams, patterns, fractions and safe observations.	Compare two solution methods and discuss why each works.
3 — Explore	For older learners, look at one suitable POSN archive example.	Notice what makes it more demanding than a classroom question; ask a teacher for guidance.
4 — Revisit	Return to mistakes, use spaced practice and explain harder answers.	Keep a small correction notebook; avoid treating timed practice as compulsory.

A suitable routine for a younger primary pupil may last just a few focused minutes. Senior learners preparing for a particular POSN centre can make a longer plan according to the centre’s official criteria. Neither this schedule nor a strong practice mark qualifies a student automatically for a Thai national team.

Frequently asked questions about Thailand Olympiads

Are POSN and School Connect Olympiad the same organisation?

No. POSN coordinates Thailand’s specialised academic Olympiad selection and training pathways. SCO is an independent school-level learning provider with free chapter-wise resources. Using SCO study materials is not entry to a POSN camp.

How does a learner apply to POSN?

POSN’s general annual description refers to July applications, August selection examinations and two later camps. Eligibility depends on subject, centre, school and year. Ask the current responsible centre; the typical months are not a live application guarantee.

Which subjects does POSN cover?

Core programmes include Mathematics, Computer Science, Chemistry, Biology and Physics. The POSN official exam archive also lists astronomy, geography, Earth Science and linguistics, with subject-specific eligibility.

What is the Thai Mathematical Olympiad (TMO)?

POSN lists Thailand’s national Mathematical Olympiad among its competition archives. TMO is not the same event as TIMO, the official international national-team IMO or SCO’s independent school contest.

Is Thailand International Mathematical Olympiad (TIMO) the official IMO?

No. TIMO is a separately organised school-level competition with its own entry arrangements. The official IMO is an event for nationally selected teams. Check any TIMO participation question at its organiser’s current website.

How did Thailand perform at the 2026 official IMO?

The official results record a six-student Thai team earning one gold, one silver and four bronze medals in 2026. Those results do not imply that every applicant is eligible or guaranteed a medal.

Where do I find genuine POSN past examination papers?

Use POSN’s official examination archive, which identifies camp tests, national events and representative selection questions. Check the actual subject, year, Thai language and level before practising. Some papers are advanced.

What learning content does SCO provide for free?

SCO provides free chapter-wise learning materials, linked educational videos and practice questions. These resources are continually updated and improved. No learning purchase is necessary to use this core learning offer.

Does free learning mean every SCO competition entry is free?

No. Studying free chapters and taking part in a separate examination are different activities. Verify the specific exam’s entry fee, grade, language, time and country availability from current instructions.

Are camp results a guaranteed university place or scholarship?

No. POSN discusses special admission opportunities whose terms are announced by individual universities. A camp attendance certificate, an SCO attempt or good practice marks do not by themselves guarantee admission.

Can primary students practise POSN questions?

Some POSN questions are designed for advanced secondary students. Primary learners should first choose age-appropriate puzzles, free SCO chapter lessons, linked videos and suitable original worked questions like those in this article.

Are these twenty questions from official Thai Olympiad exams?

No. They are new educational practice examples written for this article—not actual POSN, TMO, TIMO, official IMO or SCO examination questions.

The first achievement is understanding

Competition names and certificates can be confusing, but the foundation is straightforward: select a suitable lesson, solve a question, explain the method and check it. Thailand’s POSN pathway is a serious opportunity for eligible selected learners; the official IMO is an international national-team event. Meanwhile SCO’s free chapter-wise learning materials, linked educational videos and practice questions offer an accessible starting point, with resources continuously updated and improved. Students can begin learning today without signing up for an examination.