678
Exactly 110 times
There are two significant figures in .550
14 of them will work because: 150 (10 x 15) + 60 (4 x 15) = 210. So I hoped you like this explanation!!
There are: 100/15 = 6 with a remainder of 10
18.53
57 can go into 550 about 9 times :)
678
Seven of them.
Exactly 8 of them
Exactly 50 of them
275
15s-15 = 0
2
Exactly 110 times
The coordinates 15S, 75W represent a location in Peru, in or near Poroma on the Panamericana Sur.
Two 15s' equals 30.