No, 7 is not a multiple of 32. A multiple of 32 can be expressed as 32 times an integer (e.g., 32, 64, 96, etc.), and 7 does not fit this criterion. The multiples of 32 are all whole numbers that can be evenly divided by 32, while 7 is far less than 32.
315
They're all prime numbers, therefore it's one.
Yes.
210
12
It is: 90
It is 30
It is 20
It is 42
32-7+7=32 so, -7+7=0
7/16 - 7/32 = 7/32
The LCM is 24.