Answers

2014-11-25T16:25:45+05:30
1 + 2 = 3

1 2
3 4

3 + 4 = 7 

So ? = 7.
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2014-11-25T16:30:48+05:30
As shown in the question it says 
1 2
3 4
?
so the upwards no. are added and it gives 1+2=3 the 1 no. in second row.
so 3 and 4 would be added to get the no. in place of question mark.
3+4=7
so the answer is 7. 

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