[golfer]

the missing #'s in each sequence... 428

[abecedarius]

Geez, I thought it was asking you to extrapolate.

[mapcars]

Same, no idea what's needed from me on most of the questions

[_raoulcousins]

Damn, I feel stupid! I kept trying things like 23456789 (the same sequence but missing 2^0)

[sidcypher]

And here I thought that maybe it had to do with bits and powers of 2 (0 and 1 being among them)