0
Anonymous
-3 and -6
Wiki User
-27
Yes
27
9, 18 and 36
29
-25
the answer is 18
25
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99 . . .
1+8=9, 9x2=18 so 18 is one answer to this problem
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99.