Jawabanmu

2014-09-02T19:02:49+07:00


1 = 3
2 = 3 + 3 = 6
3 = 6 + 4 = 10
4 = 10 + 5 = 15
5 = 15 + 6 = 21
6 = 21 + 7 = 28
7 = 28 + 8 = 36
8 = 36 + 9 = 45
9 = 45 + 10 = 55
10 = 55 + 11 = 66