The greatest common factor of 45 and 105 is 15.
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You need to find work out the factors of both 45 and 105 separately, and then find which match both numbers. 45 - 1, 3, 5, 9, 15, 45 105 - 1, 3, 5, 7, 15, 21, 35, 105 The numbers that match both 45 and 105 are 1, 3, 5, and 15. 15 would therefore be called the Greatest Common Factor (GCF).
The greatest common factor of 45 and 225 is 15.The GCF is: 45
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.