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you can findthe common factors

20 - 1, 2, 4, 5, 10 ,20

22 - 1, 2, 11, 22

38 - 1, 2, 19, 38

60 - 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

1 and 2 are the only common factors in all four numbers.

the greatest common factor is 2

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14y ago

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