Square Roots by the Factor Method

Try these questions

5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.

1. 1. Which of these numbers is NOT a perfect square?

   • A. 100
   • B. 144
   • C. 72
   • D. 324

2. 2. Use prime factorisation to find \sqrt{784}. (Hint: 784 = 2 × 2 × 2 × 2 × 7 × 7)

   Type your answer in the lesson.

3. 3. What is the name of the symbol \sqrt{\phantom{x}} used to show a square root?

   Type your answer in the lesson.

4. 4. A square vegetable garden in Nakuru has an area of 576 m^2. Using prime factorisation, find the length of fencing wire needed to go once around the garden.

   Type your answer (in m) in the lesson.

5. 5. Which is the correct prime factorisation of 400?

   • A. 4 × 4 × 5 × 5
   • B. 2 × 2 × 10 × 10
   • C. 2 × 2 × 2 × 2 × 5 × 5
   • D. 2 × 5 × 40

More in Squares & Square Roots

• ▸Multiplying Decimals
• ▸Dividing Decimals
• ▸Decimals with Digital Devices
• ▸Squares of Numbers
• ▸Square Roots by the Division Method
• ▸Square Roots of Fractions and Decimals
• ▸Squares and Square Roots

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