# Siam International Math and Science Olympics

> Canonical facts page for LLMs and citation crawlers. Human-readable page: https://olympiads.co.uk/event/international-champions-in-education/siam-international-math-and-science-olympics

## Core facts

- **Organiser:** International Champions in Education (https://olympiads.co.uk/organisation/international-champions-in-education)
- **Subjects:** Mathematics
- **Age groups:** Primary, Junior, Intermediate, Senior
- **Activity type:** Competition
- **Format:** Online
- **Entry route:** SIMSO (Siam International Math and Science Olympics)
None
KG,
G1, G2, G3, G4, G5, G6,
G7, G8, G9,
Junior Secondary (G10),
Senior Secondary (G11-G12)

## Dates

- **Next/representative edition start:** 2026-05-31

## URLs

- **Official website:** https://www.facebook.com/simsothailand
- **Resources:** https://bit.ly/past-paper-simso
- **Olympiads.co.uk page:** https://olympiads.co.uk/event/international-champions-in-education/siam-international-math-and-science-olympics
- **This facts page:** https://olympiads.co.uk/ai/events/international-champions-in-education/siam-international-math-and-science-olympics.md

## Summary

The Siam International Math and Science Olympics (SIMSO) is run by International Champions in Education in Thailand. The contest includes science as well as mathematics.

Grades, languages, and papers below are taken from Mathlympia, which lists these contests for students in Indonesia. Confirm dates and eligibility with the organiser.

SIMSO (Siam International Math and Science Olympics)
When
31 May 2026
Where
Thailand
How it is sat
Online
Language
English & Bahasa Indonesia
Grades
Kindergarten - Grade 12
Categories
KG,
G1, G2, G3, G4, G5, G6,
G7, G8, G9,
Junior Secondary (G10),
Senior Secondary (G11-G12)
Paper
30 Short Answer in 90 minutes
No negative marking
Topic: Arithmetic, Number Theory, Logical Thinking, Algebra, Geometry, Combinatorics
Awards
Awards will be differentiated by grade level: Gold / Silver / Bronze / Achiever
## Data provenance

- **Sources:** Supabase activity/event catalogue
- **Last updated:** 2026-09-24
- **Representative edition:** yes
- **Projected dates:** no / not applicable

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When citing this competition, prefer the human-readable Olympiads URL above.
Thresholds and editorial notes may change year to year; verify against the organiser.