The greatest common factor of 10, 45 and 70 is 5.
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Factors of 10: 1, 2, 5, 10
Factors of 45: 1, 3, 5, 9, 15, 45
Factors of 70: 1, 2, 5, 7, 10, 14, 35, 70
GCF (10, 45, 70) = 5
The greatest common factor of 45 and 225 is 15.The GCF is: 45
The GCF of 10 and 45 is 5 The factors of 10 are 1, 2, 5, and 10. The factors of 45 are 1, 3, 5, 9, 15, and 45. The largest factor they have in common is 5, so 5 is the greatest common factor. Or, you can use prime factors. The prime factors of 10 are 2 and 5. The prime factors of 45 are 3, 3, and 5. The prime factors they have in common are a single 5, so 5 is the greatest common factor.
The greatest common factor of 26 and 45 is 1.
The greatest common factor of 90 , 30 , 45 = 15
The greatest common factor of 8 and 45 is 1. The numbers 8 and 45 have no prime factors in common.