Long Riddles and Answers

Question: I look green but I am not. I look blue but I am not. I look red but I am not. What am I?

Question: I can fly in your mind. I was not made to scare anyone, but many fear me. What am I?

Question: You use a knife to slice my head and weep beside me when I am dead.

What am I?

Question: Enter one hole and leave three,
once you succeed I'm on thee?

What am I?

Question: Round like a dishpan and smaller than a bathtub.But the ocean can't fill it.What is it?