answersLogoWhite

0


Best Answer

The greatest common factor of 45 and 55 is 5

To determine GCF you first find the prime factors of each number.

For 45 this is (5, 3, 3).

For 55 this is (11, 5).

Then you take the product of the prime factors that they have in common. In this case the only prime factor they have in common is 5 so the answer is just 5.

For a better illustration of the rule look at 45 and 30.

Prime factors of 45 are (5, 3, 3)

Prime factors of 30 are (5, 3, 2)

The prime factors in common are 5 and 3 and the product of these numbers is 15. Therefore the GCF of 45 and 30 is 15.

User Avatar

Wiki User

8y ago
This answer is:
User Avatar
More answers
User Avatar

Wiki User

14y ago

55 = 5 x 11

45 = 5 x 3 x3

GCF = 5

This answer is:
User Avatar

User Avatar

Anonymous

Lvl 1
4y ago

10

This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What is the greatest common factor of 45 and 55?
Write your answer...
Submit
Still have questions?
magnify glass
imp