1, 2, 3, 4, 6, 12
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The GCF is: 36
Oh, what a happy little question! To find the greatest common factor of 540 and 504, we can first list the factors of each number. For 540, the factors are 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 45, 54, 60, 90, 108, 135, 180, 270, and 540. For 504, the factors are 1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 28, 36, 42, 56, 63, 72, 84, 126, 168, 252, and 504. The greatest common factor is the largest number that appears in both lists, which in this case is 36.
The LCM of 18, 24, 36 and 42 is 504
The common factors of 27 and 36 are 1, 3 and 9.
The common factors of 36 and 40 are 1,2 and 4.