Good Riddles

Question: You are in a room with two metal rods and no other metal. One of them is magnetized and the other is not.

How can you determine which one is magnetized and which is not?

Question: What has no beginning, end, or middle?

Question: Although I am still, in families, I run. I continue to live on in a living one. As one continues to draw breath, I will not rust. However, when one stops drawing breath, I will become mere dust. What am I?

Question: It's a question you can ask all day long and get completely different answers although these answers could be correct. What question is it?

Question: Can a man legally marry his widow's sister in the state of California?