What is the Highest common factor of 119 and 161?

The highest common factor of 119 and 161 is seven. You have to find all of the numbers factors before you can work it out. the factors of 119 are 1,7,17 and 119, and the factors of 161 are 1,7,23 and 161, therefore the only number that occurs twice in both sequences is 7 so that is the highest common factor