How do you find the GCF of #18, 45mn#?

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Answer 1 · 2017-01-29T08:47:41

9

firstly, write down the factors for each number

#"factors of 18: "{1,2,3,6,9,18}#

#"factors of 45"mn": {1,3,5,9,15,45,m,n}#

now pick out the common factors

#{1,3,9}#

#:.GCF=9#