answersLogoWhite

0

To find the greatest common factor (GCF) of these numbers, we first need to list the factors of each number. The factors of 63 are 1, 3, 7, 9, 21, and 63. The factors of 56 are 1, 2, 4, 7, 8, 14, 28, and 56. The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The factors of 21 are 1, 3, 7, and 21. The greatest common factor among these numbers is 7.

User Avatar

ProfBot

4mo ago

Still curious? Ask our experts.

Chat with our AI personalities

BlakeBlake
As your older brother, I've been where you are—maybe not exactly, but close enough.
Chat with Blake
RafaRafa
There's no fun in playing it safe. Why not try something a little unhinged?
Chat with Rafa
FranFran
I've made my fair share of mistakes, and if I can help you avoid a few, I'd sure like to try.
Chat with Fran
More answers

The greatest common factor is the highest number that divides exactly into two or more numbers.

21: 1, 3, 7, 21

42: 1, 2, 3, 6, 7, 14, 21, 42

56: 1, 2, 4, 7, 8, 14, 28, 56

63: 1, 3, 7, 9, 21, 63

The greatest common factor for 21, 42, 56 and 63 is 7.

User Avatar

Wiki User

10y ago
User Avatar

Add your answer:

Earn +20 pts
Q: What is the greatest common factor of 63 56 42 and 21?
Write your answer...
Submit
Still have questions?
magnify glass
imp