What is the GCF of 21'and 27?

Answer 1

The factors of 210 are:

1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210

The factors of 2475 are:

1, 3, 5, 9, 11, 15, 25, 33, 45, 55, 75, 99, 165, 225, 275, 495, 825, 2475

The common factors are:

1, 3, 5, 15

The Greatest Common Factor (GCF) is:

15

Answer 2

The factors of 2574 are:

1, 2, 3, 6, 9, 11, 13, 18, 22, 26, 33, 39, 66, 78, 99, 117, 143, 198, 234, 286, 429, 858, 1287, 2574

The factors of 2772 are:

1, 2, 3, 4, 6, 7, 9, 11, 12, 14, 18, 21, 22, 28, 33, 36, 42, 44, 63, 66, 77, 84, 99, 126, 132, 154, 198, 231, 252, 308, 396, 462, 693, 924, 1386, 2772

The common factors are:

1, 2, 3, 6, 9, 11, 18, 22, 33, 66, 99, 198

The Greatest Common Factor:

GCF = 198

Answer 3

For the values 2,772 and 2,574 the GCF is: 198

Answer 4

The GCF is 1.

Answer 5

The GCF is 37.

Answer 6

The GCF is 3.

Answer 7

68

Answer 8

1274