How do you find all the factors of 28?

1 Answer
Dec 15, 2016

2,14,4,7,1,28

Explanation:

Find biggest and smallest factor
Your biggest factor is the number itself, #28#. With the biggest number, you also have the smallest factor, #1#.

For the rest of the factors;
Divide the number by #2#. #28/2=14#. Hence you should be looking for factors no bigger than #14#.

You already have #14# and #2#.

Find factors of smaller factors
What is a factor of #14#?

#7#!

If #7# is a factor of #14#, it should be a factor of #28#. If so, what times #7# becomes #28#?

4!

Every factor has its pair
If you've found a factor, ie: 2, It should have its pair. Just divide the number by 2.
If a factor is 7, divide 28 by 7 and you get 4.