The Romanian Master of Mathematics and Sciences (RMMS) is a prestigious national competition aimed at high school students in Romania. It seeks to promote excellence in mathematics and sciences, encourage problem-solving skills, and foster a spirit of healthy competition among students. The competition typically involves various challenging problems in mathematics, physics, and sometimes other scientific disciplines, designed to test students' analytical abilities and creativity.

Rocket City Math League (RCML) is a mathematics competition designed to promote problem-solving skills and math engagement among students, typically at the middle school and high school levels. The league provides a platform for students to compete in various math challenges, fostering teamwork, critical thinking, and a passion for mathematics. Participants usually work on a series of timed tests or problems that cover a wide range of mathematical concepts.

The Rhode Island Math League (RIML) is an organization that promotes mathematics education and competition among students in Rhode Island. It typically involves challenges and contests that allow students, particularly those in middle and high schools, to engage in problem-solving and critical thinking. The league provides opportunities for students to compete individually or in teams, enhancing their mathematical skills while fostering a sense of community among young mathematicians. Through various events, including regular contests and championships, participants can showcase their abilities in a supportive environment.

The Pui Ching Invitational Mathematics Competition is an annual mathematics competition that typically takes place in Hong Kong. It is organized by Pui Ching Middle School and aims to promote interest in mathematics among students at various levels. The competition usually features challenging problems that test participants' mathematical reasoning, problem-solving skills, and creativity. It attracts talented students from different schools, providing them with an opportunity to compete, collaborate, and share ideas in mathematics.

The Primary Mathematics World Contest (PMWC) is an international competition designed for elementary school students to encourage mathematical problem-solving and critical thinking skills. Organized by various educational organizations, the contest typically features age-appropriate mathematics problems that challenge participants and promote a love for mathematics. The PMWC often includes individual and team competitions, where students are tasked with solving a variety of problems that may range from arithmetic and algebra to geometry and logic puzzles.

The Pan-African Mathematics Olympiad (PAMO) is an annual mathematics competition that brings together high school students from various African countries to showcase their mathematical talents. The Olympiad aims to promote the study of mathematics in Africa, encourage collaboration among young mathematicians, and foster relationships between countries through mathematics. PAMO typically features a series of rigorous mathematics problems that challenge participants' problem-solving skills, creativity, and critical thinking.

The Ontario Mathematics Olympiad (OMO) is a mathematics competition designed for high school students in Ontario, Canada. It is intended to promote interest in mathematics and encourage students to develop problem-solving skills. The competition typically involves a series of challenging problems that require creative thinking and a deep understanding of mathematical concepts.

The Olympiade Mathématique Belge (OMB) is a mathematics competition held in Belgium, aimed at secondary school students. It serves as a platform to promote mathematical talent and foster interest in mathematics among young learners. The competition typically includes challenging problems that require creative problem-solving skills, logical reasoning, and deep mathematical understanding. The OMB is often organized in multiple rounds, starting with regional or local competitions, followed by national finals for the top-performing students.

The Olimpíada de Matemática do Grande ABC is a regional mathematics competition held in the Grande ABC region of São Paulo, Brazil. It aims to promote mathematical knowledge and foster interest in the subject among students, typically from elementary and high schools. The competition provides an opportunity for students to showcase their problem-solving skills and compete at various levels, often leading to further participation in national and international mathematics Olympiads.

The Olimpíada Brasileira de Matemática das Escolas Públicas (OBMEP) is a national mathematics competition held in Brazil, primarily aimed at public school students. Established in 2005, the competition is designed to encourage the study of mathematics and promote the development of mathematical talent among students in Brazilian public schools. OBMEP is organized by the Brazilian National Institute for Pure and Applied Mathematics (IMPA) and involves various stages.

The Olimpíada Brasileira de Matemática (OBM) is a national mathematics competition held in Brazil for students from elementary through high school levels. Established in 1979, it aims to promote the study of mathematics among students and encourage their interest in the subject. The competition consists of several stages, typically involving a set of challenging mathematical problems that require creative thinking and problem-solving skills. Students can participate individually, and their performance is evaluated at various levels based on their responses to the problems.

The North East Asian Mathematics Competition (NEAMC) is an annual mathematics competition that involves participation from countries in the Northeast Asian region. It aims to promote mathematical talent among students and foster closer ties and communication between young mathematicians in these countries. Typically, the competition features a variety of challenging mathematical problems that test students' problem-solving skills, creativity, and mathematical reasoning. Participants usually range from middle school to high school students, and the event may include individual and team competitions.

The Nordic Mathematical Contest (NMC) is a mathematical competition designed for high school students from Nordic countries, which typically include Denmark, Finland, Iceland, Norway, and Sweden. The contest aims to encourage mathematical thinking and problem-solving skills among students. The competition usually consists of several individual problems, which participants must solve within a limited time frame. Problems can cover a wide range of mathematical topics, including algebra, geometry, number theory, and combinatorics.

The New York State Mathematics League (NYSML) is an organization that focuses on promoting mathematics education and competition among students in New York State. It typically organizes a series of math competitions for middle and high school students, encouraging them to apply their mathematical skills in a competitive environment. These competitions often include individual and team events, covering a variety of mathematical topics and concepts. The NYSML provides a platform for students to challenge themselves, improve their problem-solving abilities, and develop a love for mathematics.

Miksike MentalMath is an educational tool designed to help students develop and enhance their mental arithmetic skills. It typically features a range of exercises and challenges that focus on improving speed and accuracy in performing calculations without the use of calculators or other aids. The goal of Miksike MentalMath is to make math practice engaging and accessible, often incorporating gamification elements to motivate learners. This resource can be particularly useful for children or anyone looking to strengthen their basic math skills through repetitive practice and interactive learning experiences.

The Miklós Schweitzer Competition is a prestigious international competition in the field of mathematics aimed at young mathematicians. It is named in honor of the Hungarian mathematician Miklós Schweitzer, who made significant contributions to the field. The competition typically focuses on advanced mathematical topics and problems, encouraging creativity and deep understanding among participants. The event attracts students from various countries, and it often serves as a platform for talented young mathematicians to showcase their skills and gain recognition within the mathematical community.

The Michigan Mathematics Prize Competition (MMPC) is a mathematics competition primarily aimed at high school students in Michigan. It is organized by the University of Michigan and is designed to encourage the development of mathematical problem-solving skills among participants. The competition typically features a series of challenging mathematics problems that require not just knowledge of mathematics but also creative thinking and analytical skills. Participants compete individually and may work through problems that cover a range of topics, including algebra, geometry, number theory, and combinatorics.

The Mediterranean Mathematics Competition (MMC) is an annual mathematics competition that brings together students from various countries around the Mediterranean Sea. It is designed to promote mathematical talent and foster cooperation among students from different cultural backgrounds. The competition typically features individual and team events, where participants solve challenging mathematical problems that require creativity, critical thinking, and problem-solving skills. The MMC encourages collaboration and exchange of ideas, helping students enhance their mathematical abilities and learn from each other.

Mathlete is typically used to refer to a student or individual who excels in mathematics, particularly in competitive math environments. The term can also refer to programs or clubs that promote mathematics through competitions and collaborative learning experiences. For example, some schools or organizations might have teams called "Mathletes" that participate in math competitions and tournaments to foster mathematical skills and teamwork.

The Mathematical Olympiads for Elementary and Middle Schools (MOEMS) is a problem-solving competition aimed at enhancing the mathematical capabilities of students in grades 4 through 8. Founded in 1977, MOEMS seeks to promote a love for mathematics among young learners and to develop their logical reasoning and critical thinking skills. The competition consists of a series of challenging math problems that require creativity and insightful thinking rather than rote memorization of formulas or procedures.