Good Riddles

Question: How can you make 4 triangles with 6 equal sticks?

Question: what comes up but never goes down

Question: What devours everything from birds, to tree, bats, and bees? Surrounds you wherever you are, and is always moving?

Question: I move around yet one side is hidden while another is shining. I can be seen full but only sometimes. What am I?

Question: A riddle that you cannot answer.