All multiples of 840 are common multiples of 60 and 280
The common multiples of any numbers are multiples of their lcm. The lcm of 2, 3, 4, 5 & 6 is 60 Thus the next four common multiples are 2 x 60, 3 x 60, 4 x 60 & 5 x 60 which are 120, 180, 240 & 300
30 and 60 (if you count 60)
The LCM is 60.
The common multiples of 5 and 6 are the multiples of their lowest common multiple (which is 30), so there are infinitely many common multiples of 5 and 6. The first five are: 30, 60, 90, 120, 150.
252, 504, 756 and so on.
252
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.
Any multiple of 252.
No, they are factors.
126, 252, 378
No, they are factors.
84, 168, 252
Any multiple of 252
252
60 and 42 have no common multiples under 100.