5
45 is the smallest number that both 9 and 15 divide into evenly with no remainder.
8
Nine of them
79
0.2
The GCF of 9s and 63s^3 is 9s.
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, . . .
Eleven.
10 times
Exactly 6 of them
24 of them with a remainder of 2