The LCM of 7 and 20 is 140
140
the first three common multiples of 7, 20, and 35 are 140, 280, and 420
140,280,420
140, 280, 420 and so on.
Any multiple of 1260.
They are: 140, 280 and 420
140, 280, 420
140, 280, 420
Any multiples of 20.
Only one can be least common; that's 140. Other common multiples include 280, 420, 560 and 700.
140, 280, 420, 560, 700