Exploring Number Systems
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Questions and Answers

Which of the following is true about the natural numbers?

  • They include 0.
  • They are also called counting numbers. (correct)
  • They are a subset of the integers.
  • Their sum is always a natural number.

    • Which set includes the natural numbers, their additive inverses, and zero?

  • Rationals
  • Integers (correct)
  • Naturals
  • Reals

    • What is the sum of 4 and 2000?

  • 8000
  • 1996
  • 2004 (correct)
  • 4000

    • Which of the following is true about the product of any two natural numbers?

    <p>It is always a natural number.</p> Signup and view all the answers

    Which set is sometimes written as J or Z?

    <p>Integers</p> Signup and view all the answers

    Which of the following is a rational number?

    <p>$\frac{1}{2}$</p> Signup and view all the answers

    Which of the following is NOT a rational number?

    <p>$\sqrt{2}$</p> Signup and view all the answers

    Which set of numbers is usually denoted by $\mathbb{Q}$?

    <p>Rational numbers</p> Signup and view all the answers

    Which of the following is an example of a repeating decimal?

    <p>$0.20454545$</p> Signup and view all the answers

    Which of the following is NOT a rational number?

    <p>$\frac{1}{9}$</p> Signup and view all the answers

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