The common denominator of any two or more whole numbers will always be 1.
The least common denominator is 120.
the common denominator of 10, 8, and 12 is 120.
120
120
A common denominator, though not the least one, is 120.
120
30
120
It is 120.
120
It is: 120
The common denominator will be the LCM of these numbers, which is 120.