Prime factors and perfect squares

Answer Key - Grade 6 Math Worksheet

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

1. 1.

   Bo solves a puzzle. Which number below is prime?

   • 39
   • 23
   • 1
   • 20
2. 2.

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

   • 1
   • 29
   • 24
   • 49
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.

   Milo wants 44 as a product of primes. You can type 5 × 5 × 7 or 5^2 × 7. What should Milo write?

   2, 2, 11
5. 5.

   Ren picks a card. Which one shows 88 as a product of primes?

   • 8 × 11
   • 1 × 2 × 2 × 2 × 11
   • 2 × 2 × 2 × 11
   • 2 × 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?

   • 49
   • 56
   • 51
   • 48
8. 8.

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

   • 83
   • 90
   • 80
   • 81
9. 9.

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

   • 120
   • 123
   • 132
   • 121
10. 10.

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

    12