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?

   • 19
   • 35
   • 18
   • 1
2. 2.

   Kira wants 54 as a product of primes. You can type 5 × 5 × 7 or 5^2 × 7. What should Kira write?

   2, 3, 3, 3
3. 3.

   Luz builds a factor tree for 40. You can type 5 × 5 × 7 or 5^2 × 7. What is 40 as a product of primes?

   2, 2, 2, 5
4. 4.

   Pia picks a card. Which one shows 60 as a product of primes?

   • 1 × 2 × 2 × 3 × 5
   • 2 × 2 × 3 × 5
   • 6 × 10
   • 2 × 3 × 5
5. 5.

   Bo reads 11² in a puzzle. What is 11²?

   121
6. 6.

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

   • 48
   • 49
   • 51
   • 56
7. 7.

   Kira picks a card. Which number below is a perfect square?

   • 120
   • 132
   • 123
   • 121
8. 8.

   Luz's square garden bed has an area of 64 square feet. How long is each side, in feet?

   8
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