Question

What are the common factors of 99 and 81? ( 1 point )
Is there any common factor between 69 and 39? ( 2 point )
Thank you.

Answer 1

Answer:

• Factors for 81: 1, 3, 9, 27, and 81.

• Factors for 99: 1, 3, 9, 11, 33, and 99.

The gcf of 69 and 39 can be obtained like this: The factors of 69 are 69, 23, 3, 1. The factors of 39 are 39, 13, 3, 1. The common factors of 69 and 39 are 3, 1, intersecting the two sets above.

Answer 2

Answer:

Step-by-step explanation:

*The factors of 81 (all the whole numbers that can divide the number without a remainder) are 1, 3, 9, 27 and 81;

*The factors of 99 are 1, 3, 9, 11, 33 and 99.

The common factors are 1, 3

GCF(69, 39) = 3

Steps:

Find the factors of the numbers:

69:  1, 3, 23, 69

39:  1, 3, 13, 39

Find the common factors: 1, 3