True.
Yes.
Any multiple of 10 is a multiple of 5 and 10
Any number between one and 1000 can be a common multiple.
Common multiples include any multiple of 60.
Common multiples include any multiple of 405.
Yes.
Any multiple of 28.
Any multiple of 9w
Yes.
All factors of a number n will be factors of any multiple of n. All multiples of a number n will be multiples of any factor of n.
Multiples of any multiple of 6.
Any multiple of 10 is a multiple of 5 and 10
Any number between one and 1000 can be a common multiple.
Any number between 1 and 50 can be a common multiple.
The multiples of 2 and 24 include any multiple of 24. The multiples of 22 and 4 include any multiple of 44.
Any multiple of 15.
Common multiples include any multiple of 210.