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?

   • 20
   • 1
   • 23
   • 39
2. 2.

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

   2, 2, 2, 3
3. 3.

   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
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.

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

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

   Tala picks a card. Which one shows 98 as a product of primes?

   • 2 × 7 × 7
   • 1 × 2 × 7 × 7
   • 2 × 49
   • 2 × 7
7. 7.

   Zee reads 7² in a puzzle. What is 7²?

   49
8. 8.

   Ari reads 9² in a puzzle. What is 9²?

   81
9. 9.

   Bo reads 11² in a puzzle. What is 11²?

   121
10. 10.

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

    • 83
    • 90
    • 81
    • 80