The first two yes, the second two no.
The multiples of any number are endless, but here are the multiples of eight to 100:081624324048566472808896
8,16,24,32
No.
Eight of them.
Any multiple of 24.
Any multiple of 8.
Any multiple of 24.
24 and 48
The LCM is 72.
No, they are factors of 8.
Itself and any multiples of 8
All multiples of 32 are also multiples of 8.