# 1 Answer

**Definition: A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that the numbers have in common.**

**Method:****One way to determine the common factors and greatest common factor is to find all the factors of the numbers and compare them.****The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40.****The factors of 68 are 1, 2, 4, 17, 34, and 68.****The common factors are 1, 2, and 4. Therefore, the greatest common factor is 4. http://wiki.answers.com/Q/What_is_the_greatest_common_factor_of_40_and_68**

11 years ago. Rating: 2 | |

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