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What are the common factors of 15 18 a d 12?

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you just need to list the factors of all 3 numbers, and see what numbers they have in common!

15: 1,3,5,15

18: 1,2,3,6,9,18

12: 1,2,3,4,6,12

so in all you can say that the common factors of 15,18,12 is: 1 and 3
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