Square roots of perfect squares

Answer Key - Grade 7 Math Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   Luz's quiz asks for √324, and the answer is a whole number. The pencil is freshly sharpened. What is √324?

   18
2. 2.

   Noah's robot prints √121 and waits with a blinking light. The answer is a whole number. What is √121?

   11
3. 3.

   Pia's puzzle card asks for √36. The answer is a whole number, and a gold star waits. What is √36?

   6
4. 4.

   Tala solves x² = 81 for a positive number x. The paper has a coffee ring on it. What is x?

   9
5. 5.

   Ari's quiz card says x² = 289, and x is positive. A star sticker is the prize. What is x?

   17
6. 6.

   Bo looks for a perfect square on a puzzle card. Only one number is a whole number times itself. Which number is it?

   • 169
   • 168
   • 170
   • 26
7. 7.

   Esme's math book lists four numbers, and only one is a perfect square, a whole number times itself. Which number is it?

   • 226
   • 224
   • 225
   • 30
8. 8.

   Luz compares √49 with 8 on a sheet of paper. Which statement is true?

   • They are equal
   • 8 is greater than √49
   • √49 is greater than 8
9. 9.

   Noah's quiz card compares √169 with 14. A star waits for the right statement. Which statement is true?

   • 14 is greater than √169
   • They are equal
   • √169 is greater than 14
10. 10.

    Tala's robot shows √121 − 4 on its screen and waits. Work out the root first. What is √121 − 4?

    7