30 park visitors who played the same three games-the softball pitch, dart throw, and the ring toss. Every 5th person won at softball, every 10th person the dart throw, and every 15th person, the ring toss. How many of the 30 players won all three games?
Player
1-
2-
3-
4-
5-S
6-
7-
8-
9-
10-S,D
11-
12-
13-
14-
15-S,R
16-
17-
18-
19-
20-S,D
21-
22-
23-
24-
25-S
26-
27-
28-
29-
30-S,D,R
check my thinking