han 47 is correct as 1st kai st 17 kai st 6 add huwa to 23 aya, then 23 kai st 7 add huwa, then 30 kai 8 so logically is sequence ko follow krtay huwe 38 kai st 9 add hoga !!

5 + 4 =9
9 + 8 = 17
17 + 16 = 33

The difference is doubling each time, i.e. like 4*2=8, 8*2=16, 16*2=32 so

33 + 32 = 65

look 11,8,16,17,14,28, so 11 and 8 mai 3 difference hey, then 16, 17 hey similarly 17 and 14 mai 3 difference hey then 28, so logically 29 aye ga yaha per, like 16 kai bd 17 aya hey !

what comes next in series?? 11, 77, 539
look 11*7=77
then 77*7=539
then 539*7=