80, 160, 240 and so on.
1,2,3,5,6
They are all multiples of 9. Their common multiples are 405, 810, 1215 and so on.
45 and 18
They are all the multiples of 16.They are all the multiples of 16.They are all the multiples of 16.They are all the multiples of 16.
270, 540, 810 and so on.
270, 540, 810 and so on.
the multiples of 135 are135 270 405 540 675 810 945 1080...and so on
162, 324, 486, 648, 810, 972, 1134, . . .
All multiples of 16 are also multiples of 2.
Some of the multiples of 14 are the same as the multiples of 16, but not all of them.
There are no multiples of 16 that are less than 16.
There are 9*10*9 = 810 such numbers.