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.

The Open University
Skills you'll gain: Sustainable Business, Ideation, Systems Thinking, Sustainable Development, Creative Thinking, Corporate Sustainability, Stakeholder Engagement, Business Modeling, Stakeholder Analysis, Critical Thinking, Innovation, Environmental Social And Corporate Governance (ESG), Cognitive flexibility, Sustainability Standards, Business Systems Analysis, Business Continuity, Value Propositions, Process Mapping, Design Thinking, Problem Solving
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Canva (Software), Typography, Creative Design, Logo Design, Style Guides, Graphic and Visual Design, Marketing Design, Color Theory, Brand Strategy, Branding, Competitive Analysis, Social Media Content
Mixed · Course · 1 - 3 Months

Skills you'll gain: Statistics, Data Analysis, Statistical Analysis, Regression Analysis, Analytics, Statistical Methods, Probability, Data Science, Statistical Modeling, Data-Driven Decision-Making, Statistical Inference, Probability Distribution, Applied Machine Learning, Predictive Modeling, Model Evaluation
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Cryptography, Cybersecurity, Network Security, Threat Modeling, Encryption, Identity and Access Management, Information Systems Security, Threat Detection, Firewall, Infrastructure Security, Security Controls, Security Strategy, Authorization (Computing), Authentications, Security Awareness, Risk Management Framework
Beginner · Course · 1 - 3 Months

Fundação Instituto de Administração
Skills you'll gain: Human Resources Management and Planning, Human Resource Strategy, Human Resources, Human Capital, People Management, Behavior Management, Workforce Management, Organizational Strategy, Organizational Effectiveness, Employee Engagement
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Data Storytelling, Interactive Data Visualization, Data Presentation, Data Visualization Software, Infographics, Data Mapping, Data Ethics, Histogram, Color Theory, Communication
Beginner · Course · 1 - 3 Months

Skills you'll gain: Strategic Thinking, Strategic Leadership, Teamwork, Team Leadership, Business Leadership, Team Management, Business Ethics, Organizational Leadership, Leadership, Leadership and Management, Strategic Decision-Making, Leadership Development, Critical Thinking and Problem Solving, Ethical Standards And Conduct, Decision Making
Beginner · Course · 1 - 4 Weeks

Illinois Tech
Skills you'll gain: Statistical Analysis, Statistical Programming, Data Science, Statistical Machine Learning, Data Analysis, Model Evaluation, Statistical Methods, Statistical Inference, Machine Learning, Bayesian Statistics, Regression Analysis, Predictive Modeling, Supervised Learning, Unsupervised Learning, Logistic Regression, Classification Algorithms, Decision Tree Learning, Artificial Neural Networks
Build toward a degree
Intermediate · Course · 1 - 3 Months

University of Colorado Boulder
Skills you'll gain: Diversity and Inclusion, Innovation, Organizational Leadership, Industrial and Organizational Psychology, Business Leadership, Organizational Change, Creativity, Cultural Diversity, Human Capital, Leadership, Drive Engagement, Team Performance Management, Change Management, Business, Business Strategy, Decision Making, Neurology
Build toward a degree
Beginner · Course · 1 - 3 Months

Skills you'll gain: Jenkins, Selenium (Software), GitHub, Git (Version Control System), Performance Testing, Continuous Integration, CI/CD, Apache Maven, Version Control, Test Script Development, Test Automation, Browser Compatibility, JUnit, Object Oriented Programming (OOP), Test Data, Integration Testing, Java Programming, Test Case, Test Execution Engine, Software Testing
Beginner · Specialization · 3 - 6 Months

Whizlabs
Skills you'll gain: Amazon CloudWatch, Amazon Web Services, System Monitoring, Amazon Elastic Compute Cloud, Network Monitoring, Continuous Monitoring, Amazon S3, Cloud Computing
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Responsible AI, Data Ethics, Generative AI, Large Language Modeling, Artificial Intelligence, AI Workflows, PyTorch (Machine Learning Library), AI Security, MLOps (Machine Learning Operations), Tensorflow, Information Privacy, Model Deployment, Machine Learning, A/B Testing, Version Control, Performance Tuning
Intermediate · Course · 1 - 4 Weeks