Good Riddles

Question: what does 1+1=.

Question: No matter the shape I sit in, you'll find me in a row. Although my name has no letters, my initials are MNO. What am I?

Question: Red man tickle black man butt and white man jump on top.

Question: I have eight to spare and am covered with hair.

What am I?

Question: The more you work, the more I'll eat.You keep me full, I'll keep you neat. What am I?