Number Theory

Induction Proof Method

Discover Induction Proof Method as a core part of Number Theory. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.

RSA Crypto Explained

Discover RSA Crypto Explained as a core part of Number Theory. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.

Cantor's Infinite Sizes

Discover Cantor's Infinite Sizes as a core part of Number Theory. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.

Countable Uncountable

Discover Countable Uncountable as a core part of Number Theory. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.

Divisibility and Factors

Divisibility rules let you check whether one number divides another without doing the full division. They also reveal the factor structure that underlies all of arithmetic.

Modular Arithmetic Rigorous

Discover Modular Arithmetic Rigorous as a core part of Number Theory. This lesson explains what it means, walks through a real example, introduces key terms, and includes three hands-on activities to help you understand and apply the idea.