Seven of them because 63/9 = 7
6
6
63
18
108
63
7
8
4
7
Yes.
873 I just did this in my head remembering those times tables I learnt by rote decades ago. seven nines are 63, nine nines are 81 (or in this case nine nines by 10) that is : 810+63=873
40
7.55555555556.
Four with a remainder of eight
111,111,111 nines are in a billion
Three Nines go into 27 3x9=27
There are approximately 11.88888889 nines in 107.
Exactly 20 times
There are no nines in fifty-four.
7 nines, with 5 left over.