CBSE  /  Class 8  /  Maths  /  Rational Numbers

  • 1. 
    Which of the following statements is false?

  • Natural numbers are closed under addition
  • Whole numbers are closed under addition
  • Integers are closed under addition
  • Rational numbers are not closed under addition.

  • 2. 
    Which of the following statements is false?

  • Natural numbers are closed under subtraction
  • Whole numbers are not closed under subtraction
  • Integers are closed under subtraction
  • Rational numbers are closed under subtraction.

  • 3. 
    Which of the following statements is true?

  • Natural numbers are closed under multiplication
  • Whole numbers are not closed under multiplication
  • Integers are not closed under multiplication
  • Rational numbers are not closed under multiplication.

  • 4. 
    Which of the following statements is true?

  • Natural numbers are closed under division
  • Whole numbers are not closed under division
  • Integers are closed under division
  • Rational numbers are closed under division.

  • 5. 
    Which of the following statements is false?

  • Natural numbers are commutative for addition
  • Whole numbers are commutative for addition
  • Integers are not commutative for addition
  • Rational numbers are commutative for addition.

  • 6. 
    Which of the following statements is true?

  • Natural numbers are commutative for subtraction
  • Whole numbers are commutative for subtraction
  • Integers are commutative for subtraction
  • Rational numbers are not commutative for subtraction.

  • 7. 
    Which of the following statements is false?

  • Natural numbers are commutative for multiplication
  • Whole numbers are commutative for multiplication
  • Integers are not commutative for multiplication
  • Rational numbers are commutative for multiplication.

  • 8. 
    Which of the following statements is true?

  • Natural numbers are commutative for division
  • Whole numbers are not commutative for division
  • Integers are commutative for division
  • Rational numbers are commutative for division.

  • 9. 
    Which of the following statements is true?

  • Natural numbers are associative for addition
  • Whole numbers are not associative for addition
  • Integers are not associative for addition
  • Rational numbers are not associative for addition.

  • 10. 
    Which of the following statements is true?

  • Natural numbers are associative for subtraction
  • Whole numbers are not associative for subtraction
  • Integers are associative for subtraction
  • Rational numbers are associative for subtraction.
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