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Find the prime factors of the numbers using the factor tree.
Write the prime factors in the circles.
Prime Factorization Worksheet
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7. Write the sum of all the prime factors of 450. (Count each
factor only once)
8. I am a product of three different prime numbers. My largest
prime factor is 13. I am between 185 and 200. Who am I?
9. Jamie says to Rachel that the prime factorization of 72 is 2 ×2
× 2 × 3 × 7. Is he right? If no, where is he mistaken?
10. Complete the missing prime factors in the factor tree. Write
the prime factorization underneath.
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1.
2 x 2 x 2 x 11
2.
2 × 2 × 2 × 2 × 3
3.
2 × 3 × 3 × 3
4.
2 x 3 x 3 x 7
5.
2 × 2 × 2 x 2
6.
3 x 3 x 3 x 3
7.
10
8.
195 (3 × 5 × 13 = 195)
9.
Incorrect; 72 = 2 × 2 × 2 × 3 × 3
10.
1536 = 2
9
× 3
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