Logic Riddles

Question: You are in a car with your friend and your car ran out of gas. You went to the gas station to go pick up some gas. You told your friend to close all the windows and don't turn the radio on. Your friend turned the radio on and the radio was the news reporting there is a murderer in town. Your friend looked up and saw the murderer. The murderer killed your friend. How is this possible?

Question: How do you run around your block 10 times without breathing heavily?

Question: You were counting sheep. You thought you counted eight but you only counted seven and a half. How is that possible?

Question: What has rivers but no water, forest but no trees and cities but no people.

Question: I am two five letter names 500 is at the start, 10 is in my heart. In the middle of that is 1, Near the end is none. At the end is 14, Yet that is not all that has been seen. It's a word that rhymes with liver, Yes, to the left of that is river.