Square roots of perfect squares

Answer Key - Grade 7 Math Worksheet

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

1. 1.

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

   11
2. 2.

   Zee's math book asks for the positive number x with x² = 225. What is x?

   15
3. 3.

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

   17
4. 4.

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

   • 26
   • 169
   • 168
   • 170
5. 5.

   Jun's robot shows four numbers. Exactly one is a perfect square, a whole number times itself. Which number is it?

   • 289
   • 288
   • 34
   • 290
6. 6.

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

   • √49 is greater than 8
   • 8 is greater than √49
   • They are equal
7. 7.

   Milo's math book compares √121 with 12. Which statement is true?

   • √121 is greater than 12
   • 12 is greater than √121
   • They are equal
8. 8.

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

   • √169 is greater than 14
   • They are equal
   • 14 is greater than √169
9. 9.

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

   7
10. 10.

    Zee's quiz card compares √81 with 7. One statement is true. Which statement is true?

    • √81 is greater than 7
    • They are equal
    • 7 is greater than √81