Pre-Algebra Worksheet
Prime Factorization - GCF - Factor Trees
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Prime Factorization. Prime vs. Composite, GCF, and Factor Trees |
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This worksheet contains problems on prime factorization and Greatest Common Factor.
Students must determine whether a number is prime or composite,
complete factor trees, find the prime factorization of numbers, and
calculate the GCF (greatest common factor) between numbers.
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Sample Problems from Worksheet (diagrams not shown) |
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Primes – Prime Factorization – Greatest Common Factor
1) List the first eight prime numbers.
2) List the first eight composite numbers.
3) Is the number 1 prime or composite? Explain.
Tell whether the number is prime or composite.
4) 42
5) 41
6) 112
7) 101
8) 57
9) 79
Write the prime factorization of the number. Write the answer using exponents.
10) 32
11) 42
12) 54
13) 48
14) 94
15) 58
16) 128
17) 162
18) 429
19) 188
20) 500
21) 850
Find the GCF of the numbers.
22) 16, 28
23) 49, 56
24) 36, 72
25) 50, 115
26) 24, 44
27) 80, 24
28) 70, 28
29) 220, 500
30) 81, 45
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