Deleting Quiz Submisisons

So basically, I messed up on three out of four of my Quiz submissions I just did. I'm half asleep and forgot to click on the correct answers, and now they're wrong. I know there's no way to edit them, but is there any way to delete them?

I've deleted most of your questions. For some reason I can't seem to actually get to the page for your "In what year was the Playstation Network released?" question, so I can't delete it, so It'll have to stay. If people answer it and know it's wrong, they'll flag it it'll get automatically deleted after a few flags.

I've found the PSN question and deleted it.