Question 1100255
In series we have 7 digits.

7, 2, 0, 7, 8, 4, 3,

1st digit = 7 + 1 = 8 =  5 digit,
2nd digit = 2 + 2 = 4 =  6 digit,
3rd digit = 0 + 3 = 3 =  7 digit,
4th digit = 7 + 4 = 11 = 8 digit,

The next number should be 11.
BTW It is the lottery number of actor Innocent from the Malayalam movie Kilukkam