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. (C)</p> Signup and view all the answers

Which set is sometimes written as J or Z?

<p>Integers (B)</p> Signup and view all the answers

Which of the following is a rational number?

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

Which of the following is NOT a rational number?

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

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

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

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

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

Which of the following is NOT a rational number?

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

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