Question

Find the gcf. 12 and 45
a. 12
b. 180
c. 3
d. 45

Answer 1

the greatest common factor is three because three is the only number that goes into both 12 and 45

Answer 2

GCF: 3

Explanation:

We are asked to find GCF of 12 and 45.

We know that GCF stands for greatest common factor.

To find GCF of 12 and 45, we will write down factors of our both number and then find out the greatest factor that divides both numbers completely.

Factors of 12: 1, 2, 3, 4, 6, 12.

Factors of 45: 1, 3, 5, 9, 15, 45,

We can see that the greatest number that completely divides both numbers is 3, therefore, 3 is the GCF of 12 and 45.