Problem / game
First name
Alex and Alex
School
LEPS
Country
Age
0
You solve the 15 card problem by finding the possible solutions for the first two cards which equal 15.There is a total of fourteen of these:
1+14
2+13
3+12
4+11
5+10
6+9
7+8
8+7
9+6
10+5
11+4
12+3
13+2
14+1
From trying all 14 of these as starters you find the only two solutions
6+9+11+12+4+14+7 and
8+7+13+10+6+12+9.