5, yes.
45, no.
Yes
45: 3 5 80: 2 5
The GCF of 10 and 45 is 5 The factors of 10 are 1, 2, 5, and 10. The factors of 45 are 1, 3, 5, 9, 15, and 45. The largest factor they have in common is 5, so 5 is the greatest common factor. Or, you can use prime factors. The prime factors of 10 are 2 and 5. The prime factors of 45 are 3, 3, and 5. The prime factors they have in common are a single 5, so 5 is the greatest common factor.
Use a factor tree. 45 15,3 5,3,3
45 = 3 * 3 * 5
3 x 3 x 5 = 45
It is: 5 times 7 = 45
There are two prime factors of 45, they are 3 and 5. The prime factors of 54 are 2 and 3.
No. They have 5 as a common factor.
3 and 5
They are: 3 3 and 5
45 5, 9 5, 3, 3