225, 450, 675 and so on.
The multiples of 18 are 1,2,3,6,9,18 and the multiples of 25 are 1,5,25 so the greatest is 1, its the only one they share.
There are no multiples of 5 that are prime.
30, 35, 40, 45
15, 25, 35, 45
25, 27, and 45 share no common factors aside from 1.
28,32,36,40,44
Multiples of 25 are 1, 5, and 25 Multiples of 45 are 1, 3, 5, 9, 15 and 45
27, 30, 33, 36, 39, 42 & 45..... makes seven multiples.
The integral multiples are 5, 10, 15, 20, 25, 30, 35, 40, and 45.
The numbers are: 27 30 33 36 39 42 and 45
5, 15, 25, 35, 45.
The first 10 multiples of 5 are: 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50.