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