Prime factors and perfect squares

Answer Key - Grade 6 Math Worksheet - Challenge Me

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

1. 1.

   Tala reads a clue in a book. Which of these is the prime number?

   • 88
   • 87
   • 1
   • 89
2. 2.

   Ari wants 96 as a product of primes. You can type 5 × 5 × 7 or 5^2 × 7. What should Ari write?

   2, 2, 2, 2, 2, 3
3. 3.

   Bo builds a factor tree for 80. You can type 5 × 5 × 7 or 5^2 × 7. What is 80 as a product of primes?

   2, 2, 2, 2, 5
4. 4.

   Esme breaks 90 into primes. You can type 5 × 5 × 7 or 5^2 × 7. What should Esme write?

   2, 3, 3, 5
5. 5.

   Jun writes 72 as a product of primes. How many primes are multiplied together? Count a prime again each time it repeats.

   5
6. 6.

   Luz writes 108 as a product of primes. How many primes are multiplied together? Count a prime again each time it repeats.

   5
7. 7.

   Noah is playing a number game. What is the smallest whole number greater than 0 you can multiply 68 by to get a perfect square?

   17
8. 8.

   Ren is playing a number game. What is the smallest whole number greater than 0 you can multiply 99 by to get a perfect square?

   11
9. 9.

   Zee pitches a square party tent with a floor area of 196 square feet. How long is each side, in feet?

   14
10. 10.

    Bo's square vegetable garden has an area of 400 square feet. How long is each side, in feet?

    20