45 and 18
18 and 18
5 and 6.
Just 63
21, 42, 63, 84.
21 , 42 , 63
21, 42, 63, 84
59, 61, 63
81, 162, 243, 324, 405, 486, 567, 648, 729, 810, 891, 972.
it can be any # that ads up to 9. for instince 1242. it adds up to 9. Hope this helps!
186
255
There are 11 multiples of 9 up to 100. 9 18 27 36 45 54 63 72 81 90 99