Greatest Common Factor

What is the greatest common factor of 12 and 16?

• 2

• 4

• 6

• 8

What is the greatest common factor of 4 and 8?

• 2

• 4

• 8

• 16

What is the greatest common factor of 15 and 25?

• 3

• 5

• 10

• 15

What is the greatest common factor of 9 and 30?

• 1

• 3

• 6

• 18

What is the greatest common factor of 4 and 23?

• 1

• 4

• 23

• 2

What is the greatest common factor of 3x and 6?

• 3

• 6

• x

• 3x

What is the greatest common factor of 7x and 28?

• 1

• 4x

• 7

• 4

What is the greatest common factor of 20x and 10x?

• 2

• 10

• 20x

• 10x

What is the greatest common factor of 14x and 8x?

• 1

• x

• 2x

• 8

What is the greatest common factor of 7x and 9?

• 1

• 7

• 7x

• 9