Prime Factors Worksheet
A Grade 6 math worksheet on prime factorization, including identifying prime numbers, factor trees, and writing prime factorizations.
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Prime Factors Worksheet
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Read each question carefully and answer to the best of your ability. Show all your work for factor tree problems.
1. Which of the following numbers is a prime number?
9
15
19
21
2. Which of the following numbers is NOT a prime number?
2
7
11
12
3. A prime number is a natural number greater than 1 that has no positive divisors other than 1 and .
4. The number 1 is neither prime nor .
5. A number is a natural number that can be formed by multiplying two smaller natural numbers.
6. Draw a factor tree for the number 24.
7. Draw a factor tree for the number 36.
8. Write the prime factorization of 40.
9. Write the prime factorization of 60.
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