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12th Grade Closed Sets Quizzes, Questions & Answers

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Explore whether operations keep you “inside” a set. In this quiz, you’ll test closure across integers, rationals, and reals. Try this quiz to learn the basics of closure.

Questions: 15  |  Attempts: 11   |  Last updated: Jan 21, 2026
  • Sample Question 1
    A set is closed under an operation if:
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  • Sample Question 2
    Integers are not closed under:
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  • Sample Question 3
    Which operation keeps natural numbers closed?
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