Question

How do you find the greatest common factor of 12 and 18?

Answer 1

6 is the Greatest common factor

Explanation:

Divide both the number with a common number starting with 2 or 3 or 5 or 7 ....or so on which can divide commonly to both of the number.

Here

`12 , 18`
Divided both 12 and 18 by 2 hence `6, 9`
Further divided both 3 and 9 by 3 hence `2, 3`
Hence common factors are 2 and 3
`2*3=6`

And greatest common factor among all the common number is 3.
Hence answer is 6.