How do you find the greatest common factor of 40, 10?

1 Answer
sjc
Mar 4, 2018

GCF(10,40)=10GCF(10,40)=10

Explanation:

list all the factors of each number, and pick out the common ones

factors of 10:{color(red)(1,2,5,10)}10:{1,2,5,10}

factors of 40:{color(red)(1,2),4,color(red)(5),8,color(red)(10),20,40}40:{1,2,4,5,8,10,20,40}

common factors {1,2,5,10}{1,2,5,10}

GCF(10,40)=10GCF(10,40)=10

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