Yes to all but 50.
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The LCM of 6, 9, 18, and 27 is 54. Multiples of 6 are 6, 12, 18, 24, 30, 36, 42, 48, 54, and so on Multiples of 9 are 9, 18, 27, 36, 45, 54, and so on. Multiples of 18 are 18, 36, 54, and so on. Multiples of 27 are 27, 54, and so on So the LCM of 6, 9, 18, and 27 is 54.
yes it is because 3 goes into 18 6 times - 3, 6, 9, 12, 15, 18, 21, 24, 27, 30
Factors of 27: 1, 3, 9, 27Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30GCF (27, 30) = 3
3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48.
They are: 3 6 9 12 15 18 21 24 and 27 excluding 30 which is also a multiple of 3