Answers

2015-07-17T15:01:01+05:30
5-3=2 (it's preceeding and succeeding numbers are 1,3) ie., 13
8-1=7 (it's preceeding and succeeding numbers are 6,8) i.e., 68
similarly, 
6-3=24
9-5=35
therefore, 7-1=6 (it's preceeding and succeeding numbers are 5,7) i.e., 57
7-1=57

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