Logic Riddles

Question: What's small like a mouse but protects like a lion?

Question: What is it you like to kill, but actually kills you?

Question: What Two Things Always Ask A Question But never Answer It?

Question: I am first in earth A second in heaven I appear twice in a week But you can only see me once in a year You can also see me in the middle of the sea What am I?

Question: If there were ten fish in an enclosed tank, and four swam away, three died, and three drowned, how many fish would be left?