60,120,180,240,300,360,420,480,540,600
It is: 60
60 and its multiples
They are multiples of 60.
Nope, neither are multiples of 9.
Any multiples of 60 are divisible by 60
All multiples of 840 are common multiples of 60 and 280
The multiples of 60 include 60, 120 and 180. For them to be common, they need to be compared to another set of multiples.
60 and all multiples of 60.
60 is the LCM of 12 and 30. All multiples of 60 are multiples of 12 and 30 as well.
60 and the infinitely many multiples of 60.
60 and 42 have no common multiples under 100.
45 and 54 are the multiples of 9 between 40 and 60
60,120,180 and multiples of 60
They are 180 and any of its multiples
120 and all the multiples of 120.
-55
They can be and are.