Practice - Set S with Recurring 1s
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Practice Questions
Test your understanding with targeted questions
Define cardinality in your own words.
💡 Hint: Think of the term as a way to measure the size.
What is an injective mapping?
💡 Hint: Focus on how elements correspond to one another.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does cardinality measure?
💡 Hint: Think about what it means to compare sizes.
True or False: Every countable set is finite.
💡 Hint: Remember the examples discussed for infinite sets.
1 more question available
Challenge Problems
Push your limits with advanced challenges
Given a set of all real numbers, can you extract a countably infinite subset?
💡 Hint: Think about the properties of rational numbers!
Create an example showing the union of any infinite countable sets.
💡 Hint: Look at how lists can overlap without losing countability.
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