Logic Riddles

Question: You walk down a path through the woods everyday. You always walk by one particular large rotting log which weighs over a ton. The next day you notice that there is another large log underneath the familiar one that you've never seen before. How did it get there?

Question: I have existed for centuries, but last only a month. What am I?

Question: A chicken gives meat and egg while cow gives us milk. Find another who gives us all these?

Question: How do you make 9 by just 3 toothpicks?

Question: What sport is not a sport