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: A man looks out to a boat full of people But there's not a single person on board. How is this possible?

Question: There was a family who lived in a circle house, one day they went on vacation but they left their little boy behind. When they came back they found their little boy dead in the middle of the house. They narrowed it down to three suspects: The maid, the butler, and the chef. The maid claims she was cleaning the corners, the butler claims he was organizing the closet, and the chef claims he was making finger sandwiches.

Who killed the little boy?

Question: It takes ten men ten hours to build a certain wall. How long does it take five men to build the same wall?

Question: A knight comes to a castle where his love is trapped. The castle is surrounded by a square moat that is 10 feet wide (it forms a square around the castle). The knight is able to fashion two 9 foot long planks to cross the moat.

How can he do this?