Question

What is the gcf of 12 and 20

Answer 1

the gcf of 12 and 20 is 4.

Explanation:

factor of 12 = 1,2,3,4,6,12.

factor of 20 = 1,2,4,5,10,20.

Therefore, gcf = 4

Answer 2

The GCF of 12 and 20 is 4.

Solution:

The definition of GCF:

The greatest number that is a factor of two (or more) other numbers. When we find all the factors of two or more numbers, and some factors are the same ("common"), then the largest of those common factors is the Greatest Common Factor which is abbreviated as "GCF"

In order to find the GCF we have to find its factors.

12 =
`4 * 3 , 2 * 6 , 1 * 12`

`20 = 1 * 20 , 2 * 10 , 4 * 5`

By comparing both factors we get 4 , 2 , 1 are the common factors of 12 and 20. But 4 is the highest value. Hence the GCF value for 12 and 20 is 4.