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.

Universidad Nacional Autónoma de México
Skills you'll gain: Digital Signal Processing, Musical Composition, Music, Music Theory, Performance Tuning, Data Import/Export, Programming Principles, Interoperability, Development Environment, File I/O
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Data Centers, Network Security, Network Troubleshooting, Virtual Machines, Network Monitoring, Wide Area Networks, Virtualization, Wireless Networks, Firewall, Cloud Infrastructure, Hardening, Network Architecture, Virtual Private Networks (VPN), Network Infrastructure, TCP/IP, Cloud Computing, Security Information and Event Management (SIEM), Remote Access Systems, Network Protocols, Internet Of Things
Advanced · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: Bitbucket, Git (Version Control System), Version Control, Collaborative Software, Code Review, Command-Line Interface
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Package and Software Management, Bash (Scripting Language), Git (Version Control System), GitHub, Version Control, Unix Shell, Ubuntu, Shell Script, Scripting, Unix, Scripting Languages, Unix Commands, Linux, System Configuration, Linux Administration, Linux Commands, File Management, Software Installation
Beginner · Course · 1 - 4 Weeks

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: Human Capital, Human Resources, Talent Management, Workforce Planning, Talent Acquisition, Human Resource Strategy, Employee Performance Management, Performance Appraisal, Talent Recruitment, Labor Relations, Compensation and Benefits, Succession Planning, Workforce Management, Employee Training, Diversity and Inclusion, Occupational Safety And Health, Employee Engagement
Mixed · Course · 1 - 4 Weeks

Skillshare
Skills you'll gain: Photography, Photo Editing, Post-Production, Creativity, Lifelong Learning, Photo/Video Production and Technology, Adobe Photoshop, Growth Mindedness, Creative Thinking, Storytelling, Aesthetics, Self-Awareness, Personal Development, Ethical Standards And Conduct, Persistence, Curiosity, Resilience, Overcoming Obstacles, Decision Making, Patience
Beginner · Specialization · 3 - 6 Months

Skillshare
Skills you'll gain: Adobe After Effects, Motion Graphics, Animations, Multimedia, Logo Design, Cinematography, Video Editing, 3D Modeling, Adobe Illustrator, Adobe Photoshop, Computer Graphics, Creative Design, Typography, Graphical Tools, Graphic Design, File Management, Color Theory
Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Verification And Validation, Computational Logic, System Requirements, Data Validation, Functional Requirement, Systems Design, Theoretical Computer Science
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Azure DevOps Pipelines, Azure DevOps, Continuous Delivery, CI/CD, Continuous Integration, Continuous Deployment, Version Control, Git (Version Control System)
Intermediate · Guided Project · Less Than 2 Hours

Banco Interamericano de Desarrollo
Skills you'll gain: Climate Change Mitigation, Energy and Utilities, Water Resources, Environment, Climate Change Adaptation, Environmental Issue, Water Sustainability, Environmental Science, Natural Resource Management, Land Management, Water Resource Management, Sustainable Development, Education and Training, Environment Health And Safety, Teaching, Social Studies, Sustainable Technologies, Systems Thinking, Biology, Community Development
Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Cash Flows, Income Statement, Financial Analysis, Financial Accounting, Revenue Recognition, Generally Accepted Accounting Principles (GAAP), Revenue Management, Accrual Accounting, Finance
Mixed · Course · 1 - 3 Months