Square roots of perfect squares

Answer Key - Grade 7 Math Worksheet

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

1. 1.

   Milo's science book asks for √361, and the answer is a whole number. What is √361?

   19
2. 2.

   Ren's padlock tag says x² = 49, and x is a positive number. The dials circle hopefully. What is x?

   7
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?

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

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

   • 225
   • 30
   • 226
   • 224
6. 6.

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

   • 290
   • 288
   • 289
   • 34
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.

   Pia's robot compares √64 with 8 and blinks twice. Which statement is true?

   • They are equal
   • √64 is greater than 8
   • 8 is greater than √64
9. 9.

   Ren's puzzle card says √81 + 5. A square root is worked out first. What is √81 + 5?

   14
10. 10.

    Zee's math book asks for √225 + 10. The page smells like new paper. What is √225 + 10?

    25