回复：猜数（3星）

The number is 14
all combinations:
1,3,10
1,4,9
1,5,8
1,6,7
1,2,7
2,3,9
2,4,8
2,5,7
3,4,7
3,5,6
Following the sequence:
A: no crossing
B: cross out (1,6,7) and (1,2,7)
C: cross out (1,3,10) and (3,5,6)
A: cross out (3,4,7)
B: cross out (2,3,9)
C: cross out (1,4,9)and (2,5,7)
A: A will know either (1,5,8) or (2,5,7)