Five 9s:(99 x 9 + 9) / 9 = 100
11 with 1 remaining 100 - 1 = 99 = 9 x 11
99 plus 9/9 = 100
(9*9)+(9+9)+(9/9) = 100
5
There are 8 nines in 72. This can be calculated by dividing 72 by 9, which equals 8. In other words, 9 goes into 72 eight times without any remainder.
Nine of them
9^2+9+9 +9/9 81+9+9+1=100
The GCF of 9s and 63s^3 is 9s.
10 times
Exactly 6 of them
24 of them with a remainder of 2