Question

Find the greatest common factor (GFC) for this pair of composite numbers. 10 and 15

Answer 1

Given:

The pair of composite numbers: 10 and 15

To find:

The greatest common factor (GFC) for the given pair of composite numbers.

Solution:

Two composite number are 10 and 15.

The factor forms of these two numbers are

$10=2\times 5$

$15=3\times 5$

It is clear that the common factor is 5 in both factor forms. So, the greatest common factor is

$GCF(10,15)=5$

Therefore, the greatest common factor of 10 and 15 is 5.