10, and all its multiples.
20, 40, and 60.
15, 30, 45, 60 and so on.
Only one can be least; that's 15. Other common multiples include 30 and 45.
115, 230, 345 and so on.
110
lcm(2, 3, 4, 5) = 60.
5 Because It is 5/8
30 is the lcm of the prime numbers of 2, 3 and 5
120
All multiples of 8 are also multiples of 2, but not all multiples of 2 are multiples of 8.
Four of them.