Comprehension Passage
Two number series bound by similar logic are given in the question. You'll have to understand the logic given in 1st series and answer accordingly.
1263 1390 1577 1824 2131 2498
x, ___, ____, ___, ____, ____ where x = last two digits of 44168. Find first digit of series 2.1
56
2
34
3
11
4
87
5
21