What is an Imaginary Number?


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question 1 of 3

In math, i equals _____.

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1. What is the simplified value of the expression below?

2. Which of the following expressions is a complex number?

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About This Quiz & Worksheet

Have you ever wondered what an imaginary number is and how to use it in mathematical equations? This quiz and worksheet combo will teach you the properties of imaginary numbers and give you important vocabulary terms to know so that you can pass the quiz.

Quiz & Worksheet Goals

Use this quiz and worksheet to test your understanding on the following terms and topics:

  • Simplified values
  • Definition of 'i'
  • Real solutions versus imaginary solutions
  • Imaginary numbers
  • Complex numbers

Skills Practiced

Students can use this quiz/worksheet to practice the following skills:

  • Reading comprehension- ensure that you draw the most important information from the related lesson on imaginary numbers
  • Problem solving- use acquired knowledge to solve imaginary number practice problems
  • Distinguishing differences- compare and contrast topics from the lesson, such as real and imaginary numbers
  • Knowledge application- use your knowledge to answer questions about imaginary and real solutions

Additional Learning

If you want to learn more about imaginary numbers, take a look at the corresponding lesson on What is an Imaginary Number? This lesson will cover the following objectives:

  • Identify discriminants from graphs
  • Understand the components of a complex number
  • Learn how to turn square roots of negative numbers into positive numbers