1, 2, 3 and 6
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The GCF of 18 and 42 is 6. The GCF of 42 and 56 is 14.
3
An infinite number of of multiples of 42 can be divided by 42.
0.4286
Numbers that can be divided evenly by both 3 and 7 must be multiples of the least common multiple of 3 and 7, which is 21. Therefore, any number that is a multiple of 21 can be divided by both 3 and 7. Examples of such numbers include 21, 42, 63, 84, and so on.