Find the greatest common factor of two (or three) integers

The topic  is a topic under the 6th Grade Math Mission. This exercise introduces and practices finding the greatest common factor (also called greatest common divisor).

Types of Problems
There is one type of problem in this exercise:


 * 1) Find the greatest common factor: This problem provides a couple numbers and asks the student to find the greatest common factor of the numbers.Gcf1.png

Strategies
This exercise is easy to get accuracy and speed badges because there is only one type of problem and experience with fractions increases one's ability to find greatest common factors.


 * 1) For those experienced with fractions, imagine reducing fractions. The number divided by to reduce a fraction into lowest terms is the greatest common factor.