Logic Riddles

Question: It makes everyone blind. You can't see it and it will always come back for you.

Question: You were at a carnival. You had four tickets and one ride was four tickets. Once you were done, you didn't buy anymore tickets and you had one ticket left. How is that possible?

Question: what is small but can save things that do not weight anything in it?

Question: I was going to St. Ivor when I came across a man with 7 wives and the wives had 7 sacks and in those 7 sacks were 7 kittens and with those kittens were 7 kits. How many went to St. Ivor?

Question: Disgusting and small, we wriggle through your halls, devouring books, cloths and walls. Alone we are feeble, together we have some might, glinting in our damp holes at night. What are we?