List the factors of the numbers in each set. Identify the common factors and the GCF.
1. 32, 64 and 80
32:
64:
80:
CF:
GCF:
2. 35, 28 and 42
35:
28:
42:
CF:
GCF:
3. 42, 63 and 105
42:
63:
105:
CF:
GCF:
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Answers & Comments
✏️Greatest Common Factor
1.) 32: 1, 2, 4, 8, 16, 32
64: 1, 2, 4, 8, 16, 32, 64
80: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80
CF: 1, 2, 4, 8, 16
GCF: 16
2.) 35: 1, 2, 4, 7, 35
28: 1, 5, 7, 14, 28
42: 1, 2, 3, 6, 7, 14, 21, 42
CF: 1, 7
GCF: 7
3.) 42: 1, 2, 3, 6, 7, 14, 21, 42
63: 1, 3, 7, 9, 21, 63
105: 1, 3, 5, 7, 15, 21, 35, 105
CF: 1, 3, 7, 21
GCF: 21