solving triangle puzzle (2 of many possible solutions)

 

1
2		3
4	5			6
7	8	9			10
11	12	13	14		15

 

Missing pin

Solution

 

Pin 1				Pin 5
4	–	1		12	–	5			–				–
6	–	4		10	–	8			–				–
1	–	6		3	–	10			–				–
7	–	2		15	–	6			–				–
13	–	4		2	–	9			–				–
2	–	7		7	–	2			–				–
11	–	13		1	–	4			–				–
14	–	12		14	–	12			–				–
10	–	8		4	–	13			–				–
7	–	9		12	–	14			–				–
6	–	13		6	–	13			–				–
12	–	14		14	–	12			–				–
15	–	13		11	–	13			–				–