52.33333333.........
mean is (54+66)/2 = 60
The Greatest Common Factor of the three numbers is 6.
36, 42, 48, 54, 60, 66 and so on.
42 48 54 60 66
6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66
It is 54/66 which can be simplified, if required.
66 is greater than 54.
They are: 36, 42, 48, 54, 60, 66, 72, 78.
6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, . . .
6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, . . .
6 12 18 24 30 36 42 48 54 60 66 72 ............................................
36, 42, 48, 54, 60, and 66