Prime factors and perfect squares

Answer Key - Grade 6 Math Worksheet

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

1. 1.

   Ari picks a card. Which number is the prime number?

   • 18
   • 19
   • 1
   • 35
2. 2.

   Bo solves a puzzle. Which number below is prime?

   • 39
   • 1
   • 20
   • 23
3. 3.

   Esme looks for a prime number on a map. Which one is it?

   • 24
   • 1
   • 29
   • 49
4. 4.

   Jun breaks 24 into primes. You can type 5 × 5 × 7 or 5^2 × 7. What should Jun write?

   2, 2, 2, 3
5. 5.

   Noah breaks 66 into primes. You can type 5 × 5 × 7 or 5^2 × 7. What should Noah write?

   2, 3, 11
6. 6.

   Bo reads 11² in a puzzle. What is 11²?

   121
7. 7.

   Esme picks a card. Which number is a perfect square?

   • 56
   • 49
   • 48
   • 51
8. 8.

   Jun picks a card. Which one is the perfect square?

   • 83
   • 81
   • 80
   • 90
9. 9.

   Milo cuts a square from paper. Its area is 100 square centimeters. How long is each side, in centimeters?

   10
10. 10.

    Noah sews a square quilt block with an area of 144 square inches. How long is each side, in inches?

    12