Classifying Real Numbers: Practice Problems

The video tutorial covers the classification of real numbers, including integers, rational, and irrational numbers. It explains how to identify subsets of real numbers and apply them to real-world situations. The tutorial also demonstrates set operations like intersection and union, and discusses closure properties of number sets, providing examples and counterexamples.

Which of the following is NOT a subset of real numbers?

• Irrational numbers

• Whole numbers

• Rational numbers

• Complex numbers

What type of number is -73?

• Counting number

• Whole number

• Integer

• Irrational number

Which subset does the fraction 5/9 belong to?

• Rational number

• Whole number

• Integer

• Irrational number

What type of number is 18π?

• Rational number

• Irrational number

• Whole number

• Integer

Which set of numbers best describes the number of people on a bus?

• Whole numbers

• Rational numbers

• Irrational numbers

• Real numbers

What set of numbers best describes the area of a circular platform?

• Whole numbers

• Rational numbers

• Irrational numbers

• Integers

Which set of numbers best describes the value of coins in a purse?

• Integers

• Whole numbers

• Rational numbers

• Irrational numbers

What is the intersection of sets C and D if C = {4, 8, 12, 16, 20} and D = {5, 10, 15, 20}?

• {}

• {20}

• {5, 10, 15, 20}

• {4, 8, 12, 16, 20}

What is the union of sets C and D if C = {6, 7, 12, 14, 18, 24} and D = {21, 28}?

• {6, 7, 12, 14, 18, 24, 21, 28}

• {6, 7, 12, 14, 18, 24}

• {21, 28}

• {}

Is the set of whole numbers closed under multiplication?

• No

• Yes

• Sometimes

• Depends on the numbers

Tags

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