Nope. Wish there was... Then I wouldn't have to go through 300+ messages.
No :'( I wish there was
Unfortunately not. XP
No, there isn't, but it's possible to make quiz notifications come once a week. That may stop the others from coming. Then it would be possible to delete the others. I'm not sure if it'll be fast though.
You click select all then delete
That only works 10 at a time.
Um, I don't think so, but you can just do "select all", "delete" and do that for every page, and you can go to settings and limit it to one message a day
Not that I know of. Sorry