Answers

2016-02-05T15:56:36+05:30
I think that 1738 is answer 
let 1st term is f1,f2,f3,f4
so,first difference=f2-f1
ans=83
second diff=f3-f2
ans=83*2
here we see that diff are different
there are 5 digits so,83*5=415
next digit or no. will be 1323+415=1738
hence proved 
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