I look at these numbers and they can be related to cities. Which? Why?
35108
1710
50337
Think creatively.
These three numbers relate (respectively) to:
BOISE (the capital of Idaho, US), DILI (the capital of Timor-Leste) and LEEDS (in the UK).
Because...
...if you rotate these numbers by 180 degrees (and imagine them written on a 7-segment calculator display), the upside-down numbers somewhat resemble the city names spelled out!
35108 -> BOISE
1710 -> DILI
50337 -> LEEDS
i.e. 0=D, 1=I, 3=E, 5=S, 7=L, 8=B.
Diagrammatically: