Number theory courses can help you learn prime numbers, divisibility rules, modular arithmetic, and integer properties. You can build skills in problem-solving, logical reasoning, and algorithmic thinking, that support tackling complex mathematical challenges. Many courses introduce tools like Python for implementing algorithms and mathematical software for exploring number patterns, enabling you to apply your knowledge in practical situations such as cryptography and coding theory.

University of California, Davis
Skills you'll gain: Social Network Analysis, Social Sciences, Network Analysis, Social Studies, Data Science, Machine Learning, Computational Thinking, Artificial Intelligence, Data Analysis, Simulations, Big Data, Digital Transformation, Predictive Modeling
Beginner · Course · 1 - 4 Weeks

Arizona State University
Skills you'll gain: Strategic Thinking, Visionary, Research, Influencing, Strategic Decision-Making, Data Collection, Systems Thinking, Strategic Planning, Proactivity, Negotiation, Business Strategy, Complex Problem Solving, Surveys, Creative Thinking, Scientific Methods, Decision Making, Recognizing Others, Active Listening, Cognitive flexibility, Research Methodologies
Beginner · Specialization · 3 - 6 Months

Universiteit Leiden
Skills you'll gain: Ancient History, Culture, Language Learning, Anthropology, Social Studies, Multilingualism, Literacy, Research, Research Methodologies
Intermediate · Course · 1 - 3 Months
Illinois Tech
Skills you'll gain: Market Dynamics, Supply And Demand, Game Theory, Product Lifecycle Management, Business Strategy, Competitive Analysis, Business Economics, Business Strategies, Innovation, Strategic Thinking, Cost Reduction, Economics, Market Trend, Strategic Decision-Making, Price Negotiation, Global Marketing, Market Analysis, Strategic Planning, Team Leadership, Adaptability
Build toward a degree
Beginner · Specialization · 3 - 6 Months

Rice University
Skills you'll gain: Diversity Equity and Inclusion Initiatives, Diversity and Inclusion, Diversity Awareness, Human Resource Strategy, Employee Retention, Demography, Workplace inclusivity, Benchmarking, Social Justice, Cultural Diversity, Human Resources, Recruitment Strategies, Peer Review, Organizational Development, Business Planning, Workforce Development, Organizational Effectiveness, Training Programs, Performance Review, Leadership and Management
Intermediate · Specialization · 3 - 6 Months

University of Colorado Boulder
Skills you'll gain: Model Based Systems Engineering, Failure Analysis, Systems Engineering, Engineering Management, Requirements Management, Scope Management, Design Reviews, Project Scoping, Root Cause Analysis, Program Management, Requirements Analysis, User Requirements Documents, Test Engineering, Cost Management, Contract Management, Systems Design, Business Requirements, Systems Thinking, Project Risk Management, Risk Management
Build toward a degree
Beginner · Specialization · 3 - 6 Months

The University of Sydney
Skills you'll gain: Linear Algebra, Markov Model, Geometry, Arithmetic, Algebra, General Mathematics, Advanced Mathematics, Probability, Mathematics and Mathematical Modeling, Mathematical Theory & Analysis, Mathematical Modeling, Applied Mathematics, Statistical Methods, Vector Databases, Engineering Analysis, Computational Logic
Intermediate · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Oral Expression, Human Learning, Education Software and Technology, Technical Communication, Education and Training, Writing, Community Outreach, Learning Theory, Research, Technical Writing, Learning Management Systems, Scientific Methods, Media and Communications, Science and Research, Persuasive Communication, Program Evaluation, Interviewing Skills, Photography, Infographics, Storytelling
Beginner · Course · 1 - 3 Months

Berklee
Skills you'll gain: Music Theory, Music, Musical Composition, Storytelling, Writing
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: MySQL, SQL, Relational Databases, Data Analysis, Computer Programming, Computer Science
Beginner · Guided Project · Less Than 2 Hours

University of California, Irvine
Skills you'll gain: Threat Modeling, Risk Management, Business Continuity Planning, Asset Protection, Risk Analysis, Business Risk Management, Risk Management Framework, Risk Mitigation, Vulnerability Assessments, Asset Management, Disaster Recovery, Security Controls
Mixed · Course · 1 - 4 Weeks

West Virginia University
Skills you'll gain: Sustainable Development, Economics, Environment and Resource Management, Environmental Resource Management, Natural Resource Management, Supply And Demand, Environmental Science, Product Knowledge, Materials science, Climate Change Mitigation, Sustainable Engineering, Construction
Beginner · Course · 1 - 4 Weeks