Good Riddles

Question: there are 3 houses. a brown house a green house and white house. if the green house is in front of the brown house. and the brown house is in the back of the green house, Where is the white house?

Question: What is it that no one wants to have, but if he has it, he doesn't want to lose it?

Question: what comes up but never goes down

Question: Like a middle pillar I stand among 6, all 9 of my characters make me the largest to exist.

Question: There were 10 horses and 9 paddocks. How do you fit all 10 horses in the paddocks with only 1 allowed in each paddock?