Overview
The Southeast Asian Mathematical Olympiad (SEAMO) is an international mathematics contest for school students, run by TCIMO PTE LTD in Singapore with country partners. The official site describes it as ranking participants across 18 regions, and gives awards of medals and certificates. The guidelines page still describes the 2021 edition, so some details may have changed.
Who can take part
Students aged 7 to 18, in private or public school or homeschooled. Students give their academic grade level at registration, and the portal assigns the paper (Papers A to F) automatically.
Awards and ranking
Candidates are ranked within their own academic level and country. In the 2021 guidelines, gold went to the 92nd percentile and above, silver to the 80th to below 92nd, bronze to the 60th to below 80th, and a certificate of participation to the rest. Top performers locally can take part in the extended round, SEAMO X: the top 40 percent in a Champions Division and the remainder in an Open Division.
Important dates
For 2026, the exam period starts on 4 October 2026. Registration opened on 13 July 2026 and the deadline shown for the India region was 30 September 2026. Dates differ by region.
How to take part
Register through the SEAMO portal or a country partner, and choose a test centre when registering. An invoice with payment instructions is sent after registration, fees differ by country and currency, and a hall ticket is sent once payment is made. In 2021, the exam could be taken online.
Preparation tips
Practise the official sample and past papers on the SEAMO site for your level, which registered candidates can download.
Registered candidates also have an online practice portal and a free online training course.
Note
Paper lengths, question types, fees and dates are not stated on the pages read. Confirm them on the official site before registering.