What is the greatest common factor of 90 and 315?

Answer 1

The factors of 90 are:

1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90

The factors of 324 are:

1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 324

The common factors are:

1, 2, 3, 6, 9, 18

The Greatest Common Factor:

GCF = 18

Answer 2

2 x 3 x 3 x 5 = 90

2 x 2 x 3 x 3 x 3 x 3 = 324

Answer 3

• Factors of 90: 1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
• Factors of 315: 1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315
• GCF (90, 315) = 45

Answer 4

The GCF is 18.

Answer 5

The GCF is 45.