Answer:
1. : 4
2. : 15
Explanation:
Factors for 20: 1, 2, 4, 5, 10, 20
Factors for 32: 1, 2, 4, 8, 16, 32
Looking at the factors, we can see that the largest factor 20 and 32 have in common is 4. The answer isn't 1 or 2 because we are looking for the greatest common factor. This means we are looking for the largest of the factors which they both share.
Factors of 45: 1 , 3 , 5 , 9 , 15 , and 45.
Factors of 75: 1 , 3 , 5 , 15 , 25 and 75
Looking at these factors, we can see that 15 is the largest factor that 45 and 75 both share. The answer is not 1, 3, or 5 because we are again looking for the GREATEST common factor.
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