There is an infinite number of common multiples for 7 and 20. A common multiple of any two or more numbers is any number into which each of two or more numbers can be divided evenly (zero remainder). The set starts with the multiples 140, 280, 420, 560, 700, 840, 980, 1120, 1260, 1400, and so on
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
They are: 140, 280 and 420
Any multiple of 1260.
140, 280, 420 and so on.
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