Answer:
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
I rise and fall no matter what, only at finals rest do I not budge. What am I?
What room do ghosts avoid?
I am quick when I’m thin. I am slow when I’m fat. Wind is my worst nightmare.
I am one with eight to spare, lest I lose my one. I'm not a number. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.