Answers

2016-04-08T16:08:58+05:30
I think the answer is 4
0
2016-04-08T17:53:53+05:30
9.......7........5
    2........3........4
9 - 2 = 7
7-2 = 5

2+1 = 3
3+1 = 4

? = 5
0