Logic Logic

Depending on your assumptions, logic is the study of what is provably true and consistent.


Take a guided, problem-solving based approach to learning Logic. These compilations provide unique perspectives and applications you won't find anywhere else.


Our logic exploration starts with a love of puzzles and builds up to some truly mind-bending challenges. It covers liar and truth-teller riddles, formal logical fallacies, machine logic, and even some strategic game theory!

Logic is an organized way of reasoning that can grow increasingly complex and beautiful as your strategic systems become larger and stranger. This makes logic the perfect topic area for pushing your mental limits to the brink with everything from pirates, werewolves, knights and knaves to AND, NOT, and XOR logic gates!

Joy of Problem Solving

Exploring a variety of problems that stretch how you reason is a critical part of training yourself as a mathematical thinker. Problem solving requires creativity, intuition, knowledge, and skill. It also requires practice. We want you to get a workout every day that strengthens your problem solving ability in topics ranging from logic to algebra to some beautiful geometry. Hundreds of “ah ha!” moments await you!

Concept Practice

Sharpen your skills with these quizzes designed to check your understanding of the fundamentals.

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