15 numbers, 5N (-2) system

A pretty decent 15 numbers system that guarantees 3x third prize if the drawn numbers happen to be among the 15 numbers you chose. 

1)  4-5-9-11-14
2)  1-2-4-6-14
3)  2-5-11-12-15
4)  2-5-8-10-13
5)  1-3-5-8-13
6)  2-6-10-11-15
7)  3-7-10-12-14
8)  6-7-9-12-13
9)  4-7-8-9-15
10) 1-3-9-10-15
11) 3-4-6-8-11
12) 1-7-11-13-14
13) 6-8-12-14-15
14) 1-4-10-12-13
15) 2-3-9-13-14
16) 1-3-5-6-7
17) 1-8-9-11-12
18) 2-4-7-8-10
19) 3-4-5-13-15
20) 5-6-9-10-11
21) 2-3-7-9-12
22) 1-7-10-14-15
23) 2-3-11-13-15
24) 4-5-7-12-14
25) 6-8-10-13-14
26) 2-5-8-9-11
27) 1-2-4-6-15

With no miss you have 31% chance to hit the jackpot, 46% chance to hit the second prize and 23% chance to hit the third prize. With one miss you have 50% chance to hit the second prize and 50% chance to hit the third prize. As you notice, while you have a decent chance to hit the jackpot or the second prize only the third prize is guaranteed if the numbers drawn are among the 15 you picked.

Good luck!

babaro

P.S. Let me know if you win something using these systems.  I am "only" charging 50% of your gain :)