1) Raffles Mathematical Olympiad (RMO Round 1) by Raffles Institution is on 10th April 2025 (Thursday) - a one-hour multiple-choice online test (20 questions)
2) Raffles Science Olympiad (RSO) by Raffles Institution is on 3rd April 2025 (Thursday) - a one-hour multiple-choice test in Astronomy, Biology, Chemistry and Physics.
3) World English Contest (WEC) by The World Contests is on 7th July 2025 (Monday Youth Day, 9am) - a 1.5 hour online test (36 questions).
4) World Math Contest (WMC) by The World Contests is on 20th July 2025 (Sunday, 9am) - a 1.5h online test (36 questions).
5) World Science Contest (WSC) by The World Contests is on 27th July 2025 (Sunday, 9am) - a 1.5h online test (42 questions).
6) Visual - Spatial Mathlympics by Learners' Connection is on 22nd April 2025 (Tuesday) - a 1.5 hour written paper (30 questions).
7) Asia Pacific Mathematical Olympiad for Primary School (APMOPS) by Hwa Chong Institution is on 17th April 2025 (Thursday) - a 2h online test.
8) Raffles Mathematical Olympiad (RMO Invitation Round) by Raffles Institution is on 9th May 2025 (Friday) - a 1.5 hour written paper.
9) World Chinese Contest (WCC) by The World Contests is on 6th July 2025 (Sunday, 9am) - a 1.5 hour online test (42 questions).
10) World Gifted Math (WGM) by The World Contests is on 13th July 2025 (Sunday, 9am) - 1.5 hour online test (36 questions).
11) World Gifted English (WGE) by The World Contests is on 6th July 2025 (Sunday, 9am) - 1.5 hour online test (42 questions).
12) Asia Pacific Mathematical Olympiad for Primary School (APMOPS) Invitation Round by Hwa Chong Institution is on 31st May 2025 (Saturday) - a 2h written paper (6 questions).
13) Singapore Primary Science Olympiad (SPSO) by NUS High School is on 20th May 2025 (Tuesday) - a one-hour 15 minutes multiple-choice test (40 questions).
14) National Mathematical Olympiad of Singapore (NMOS - 1st round) by NUS High School Preliminary Round is on 15th July 2025 (Tuesday) - Preliminary Round: 1.5 hour written paper.
15) Annual Mathlympics is on 8th July 2025 (Tuesday) by Learners' Connection - 2 hours written paper (28 open-ended questions in Vault section + 30 open-ended questions in Sprint section)
16) National Mathematical Olympiad of Singapore (NMOS - 2nd round) Special Round by NUS High School is on 26 July 2025 (Saturday) - Special Round via invitation: 1.5 hour written paper.
