360
The least common denominator for 9 and 10 is 90.
4410
It is: 90
It is: 1080
It is: 90
The least common multiple of 24 , 90 , 100 = 1,800
LCD(30, 45) = 90
You need at least two numbers to find something in common. 90 can be a common denominator of other numbers, but it can't have a common denominator all by itself.
The LCD of 18 and 30 is 90
LCM(24, 90) = 360
This cannot be answered properly because at least two numbers are required.
The LCM of these three numbers is 90.