The factors of 15 are: 1, 3, 5, 15 The factors of 45 are: 1, 3, 5, 9, 15, 45 The factors of 90 are: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90 The factors of 1545 are: 1, 3, 5, 15, 103, 309, 515, 1545
The common factors of 45 and 90 are 1,3,5
19 and 90 have no common prime factors.
Since 45 is a factor of 90, all of its factors are common.
The common factors of 90 and 189 are 1, 3 and 9.
The common factors are: 1, 2
The common factors of 90 and 144 are: 1, 2, 3, 6, 9, and 18
The common factors are: 1, 3, 9
The GCF is 90.
The Greatest Common Factor of 20 and 90 is 10, because the factors of 20 are: 20:1,2,4,5,10,20 The factors of 90 are: 90:1,2,3,5,6,9,10,15,18,30,45,90 So, the common factors are 1,2,5,10 10 is the greatest number of them so 10 is the Greatest Common Factor. THE ANSWER IS 10
The factors of 90 are 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90. For them to be common, they need to be compared to another set of factors.
The highest common factor is 5