Answer:
1.
Factors of 15: 1, 3, 5, 15
Factors of 45: 1, 3, 5, 9, 15, 45
Common Factors: 1, 3, 5, 15
GCF: 15
2.
Factors of 8: 1, 2, 4, 8
Factors of 24: 1, 2, 3, 4, 6, 8, 12, 24
Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40
Common Factors: 1, 2, 4, 8
GCF: 8
3.
Factors of 56: 1, 2, 4, 7, 8, 14, 28, 56
Factors of 28: 1, 2, 4, 7, 14, 28
Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40
Factors of 90: 1, 2, 3, 5, 6, 9, 10, 15, 30, 45,90
Common Factors: 1, 2
GCF: 2
4.
Multiple of 7: 7 14 21 28 35 42 49 56 63 70
Multiple of 14: 14 28 42 56 70 84 98 112 126 140
LCM: 14
5.
Multiple of 4: 4 8 12 16 20 24 28 32 36 40
Multiple of 8: 8 16 24 32 40 48 56 64 72 80
Multiple of 12: 12 24 36 48 60 72 84 96 108 120
LCM: 24
6.
Multiple of:
14 - 14 28 42 56 70 84 98 112 126 140
7 - 7 14 21 28 35 42 49 56 63 60
4 - 4 8 12 16 20 24 28 32 36 40
2 - 2 4 6 8 10 12 14 16 18 20
LCM: No common multiple
Step-by-step explanation:
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